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Supply Chain and Operations Management

The concept of the supply chain (SC) emerged as the result of successive extensions to approaching production processes. Terminology, from the organisation of production to industrial organisation, operations management (OM) and comprehensive logistics has converged to ‘the supply chain’, and it currently refers to a network of entities that participate in the design, procurement, distribution, and when necessary the recovery, remanufacturing and recycling of certain goods and services as well as the flows of materials, finances, information and people between these entities. Thus, it is an integrative concept that reflects the actual development of the supply systems for goods and services. As a result of these developments, a growing proportion of supply chains have a global reach, which makes it difficult to optimise their design and management and shifts focus to or reinforces the importance of other concepts, such as resilience and robustness. Also, the growing concern for sustainability and respecting the environment is reflected in the increasing significance being given to research into the green design and management of these supply chains and CLSCs (closed loop supply chains, a concept that stems from the development of inverse logistics).

Currently, the concept of the supply chain, which includes and exceeds logistics and operations management, centres on research into supply, production, distribution and recovery. Although, strictly speaking, the concept of supply chain management includes operations management, the joining of the two names in the title of the present doctoral programme shows which aspect of supply chain management receives more emphasis.

Research staff involved in the programme have far-reaching and recognised experience with teaching, researching, and supervising doctoral theses in the subject matters involved in the programme. The participation of this staff in research projects and conferences as well as publications in high impact journals further demonstrate their research experience in matters related to the Supply Chain and Operations Management (SCOM) programme.

The aim of the doctoral programme in SCOM is to promote and carry out research related to the supply chain and thus contribute to improving the economic and environmental efficiency of all kinds of organisations.

This programme responds to the need to train highly qualified R&D personnel who can improve the efficiency and environmental impact of the processes of supply, production, distribution, recovery, remanufacturing and recycling. The programme is particularly valuable to a region in which industry and logistics are especially relevant, such as Catalonia. But, the needs for the training provided by the programme extend across the globe and thus, the programme has a strong international component.

Because of the nature of the SC, research in the field encompasses a variety of methodologies, and the aims of this research could be to develop concepts, to build theories based on empirical evidence or to formalise problems related to the design and management of SCs (which may or may not involve creating and utilising mathematical models). The research activities performed by the academic staff involved with the programme has yielded results in all of the facets mentioned regarding the design and management of the supply chain and the operations management at its core.

COORDINATOR

Mateo Doll, Manel

CONTACT

Doctoral Area, UTGAEIB-ETSEIB. Pavelló I (South Campus)
Tel.: 934 016 586
E-mail: doctorat.scom.utgaeib@upc.edu

https://ioc.upc.edu/ca/docencia/scom

General information

Access profile

The most appropriate academic background for admission to the doctoral programme in SCOM would be holding a science or technology degree and having completed a master’s programme in Industrial Engineering, Organisational Engineering or Logistics/Supply Chain (a master’s programme offering scientific contents similar to those in the present programme). In addition to this academic background, certain personal characteristics are considered important, such as having interest in the research projects that are carried out in the programme, having critical and analytical capacities, having initiative, being consistent and persistent with work, being able to work in a team and being able to communicate appropriately both orally and in writing.

Output profile

Doctoral candidates who complete a doctoral degree will have acquired the following competencies, which are needed to carry out quality research (Royal Decree 99/2011, of 28 January, which regulates official doctoral studies):

a) A systematic understanding of the field of study and a mastery of the research skills and methods related to the field.
b) An ability to conceive, design or create, put into practice and adopt a substantial process of research or creation.
c) An ability to contribute to pushing back the frontiers of knowledge through original research.
d) A capacity for critical analysis and an ability to assess and summarise new and complex ideas.
e) An ability to communicate with the academic and scientific community and with society in general as regards their fields of knowledge in the manner and languages that are typical of the international scientific community to which they belong.
f) An ability to foster scientific, technological, social, artistic and cultural progress in academic and professional contexts within a knowledge-based society.

The award of a doctoral degree must equip the graduate for work in a variety of settings, especially those requiring creativity and innovation. Doctoral graduates must have at least acquired the personal skills needed to:

a) Develop in contexts in which there is little specific information.
b) Find the key questions that must be answered to solve a complex problem.
c) Design, create, develop and undertake original, innovative projects in their field.
d) Work as part of a team and independently in an international or multidisciplinary context.
e) Integrate knowledge, deal with complexity and make judgements with limited information.
f) Offer criticism on and intellectually defend solutions.

Finally, with respect to competencies, doctoral students must:
a) have acquired advanced knowledge at the frontier of their discipline and demonstrated, in the context of internationally recognised scientific research, a deep, detailed and well-grounded understanding of theoretical and practical issues and scientific methodology in one or more research fields;
b) have made an original and significant contribution to scientific research in their field of expertise that has been recognised as such by the international scientific community;
c) have demonstrated that they are capable of designing a research project that serves as a framework for carrying out a critical analysis and assessment of imprecise situations, in which they are able to apply their contributions, expertise and working method to synthesise new and complex ideas that yield a deeper knowledge of the research context in which they work;
d) have developed sufficient autonomy to set up, manage and lead innovative research teams and projects and scientific collaborations (both national and international) within their subject area, in multidisciplinary contexts and, where appropriate, with a substantial element of knowledge transfer;
e) have demonstrated that they are able to carry out their research activity in a socially responsible manner and with scientific integrity;
f) have demonstrated, within their specific scientific context, that they are able to make cultural, social or technological advances and promote innovation in all areas within a knowledge-based society;
g) have demonstrated that they are able to participate in scientific discussions at the international level in their field of expertise and disseminate the results of their research activity to audiences of all kinds.

Number of places

10

Duration of studies and dedication regime

Duration
The maximum period of study for full-time doctoral studies is three years, counted from the date of admission to the programme to the date of submission of the doctoral thesis. The academic committee of the doctoral programme may authorise a doctoral candidate to pursue doctoral studies on a part-time basis. In this case, the maximum period of study is five years, counting from the date of admission to the programme to the date of submission of the doctoral thesis. For calculating these periods, the date of admission is considered to be the date of the first enrolment for tutorials, and the date of submission the moment in which the Doctoral School officially deposits the doctoral thesis.

For full-time doctoral candidates, the minimum period of study is two years, counted from the date of an applicant's admission to the programme until the date on which the doctoral thesis is deposited; for part-time doctoral candidates it is four years. When there are justified grounds for doing so, and the thesis supervisor and academic tutor have given their authorisation, doctoral candidates may request that the academic committee of their doctoral programme exempt them from the minimum period of study requirement.

The calculation of periods of study will not include periods of absence due to illness, pregnancy or any other reason provided for in the regulations in force. Students who find themselves in any of these circumstances must notify the academic committee of the doctoral programme, which, where appropriate, must inform the Doctoral School. Doctoral candidates may also temporarily withdraw from the programme for up to one year, and this period may be extended for an additional year. Doctoral candidates who wish to interrupt their studies must submit a justified request to the academic committee of the doctoral programme, which will decide whether or not to approve the request. Each programme will establish conditions for readmission to doctoral studies.

Extension
If full-time doctoral candidates have not applied to deposit their thesis by the end of the three-year period of study, the academic committee of the programme may authorise an extension of up to one year. In exceptional circumstances, a further one-year extension may be granted, subject to the conditions established by the corresponding doctoral programme. In the case of part-time doctoral candidates, an extension of two years may be authorised. In both cases, in exceptional circumstances a further one-year extension may be granted by the Doctoral School's Standing Committee, upon the submission of a reasoned application by the academic committee of the doctoral programme.

Dismissal from the doctoral programme
A doctoral candidate may be dismissed from a doctoral programme for the following reasons:

  • The doctoral candidate submitting a justified application to withdraw from the programme.
  • The maximum period of study and of extensions thereof ending.
  • The doctoral candidate not having enrolled every academic year (unless he or she has been authorised to temporarily withdraw).
  • The doctoral candidate failing two consecutive assessments.
  • The doctoral candidate having disciplinary proceedings filed against him or her that rule that he or she must be dismissed from the UPC.

Dismissal from the programme implies that doctoral candidates cannot continue studying at the UPC and the closing of their academic record. This notwithstanding, they may apply to the academic committee of the programme for readmission and the committee must reevaluate them in accordance with the criteria established in the regulations.

Organization

COORDINATOR:
ACADEMIC COMMISSION OF THE PROGRAM:
STRUCTURAL UNITS:
  • Department of Management (PROMOTORA)
  • Institute of Industrial and Control Engineering
SPECIFIC URL OF THE DOCTORAL PROGRAM:
https://ioc.upc.edu/ca/docencia/scom

CONTACT:
Doctoral Area, UTGAEIB-ETSEIB. Pavelló I (South Campus)
Tel.: 934 016 586
E-mail: doctorat.scom.utgaeib@upc.edu

Agreements with other institutions

A collaborative agreement exists between the UPC and the Monterrey Institute of Technology and Higher Education in Mexico (ITESM, by its Spanish acronym) that has resulted in the conducting of a four-week long course in logistics by the IOC (one of the entities sponsoring this doctoral programme). This course will be held every July. Similarly, candidates have the possibility to collaborate with the ITESM on topics related to the programme.

The group regularly collaborates with international researchers, whether under the framework of projects or via research stays (some professors carry out stays at foreign research centres while drafting their doctoral theses). Among these international researchers, the following are worth noting: Salhi (University of Kent, United Kingdom), Kubiak (University of Newfoundland, Canada), Dolgui (École des Mines de Saint-Étienne, France), Aghezzaf (Ghent University, Belgium), Ana Barbosa-Povóa (University of Lisbon, Portugal).

Access, admission and registration

Access profile

The most appropriate academic background for admission to the doctoral programme in SCOM would be holding a science or technology degree and having completed a master’s programme in Industrial Engineering, Organisational Engineering or Logistics/Supply Chain (a master’s programme offering scientific contents similar to those in the present programme). In addition to this academic background, certain personal characteristics are considered important, such as having interest in the research projects that are carried out in the programme, having critical and analytical capacities, having initiative, being consistent and persistent with work, being able to work in a team and being able to communicate appropriately both orally and in writing.

Access requirements

Applicants must hold a Spanish bachelor’s degree or equivalent and a Spanish master’s degree or equivalent, provided they have completed a minimum of 300 ECTS credits on the two degrees (Royal Decree 43/2015, of 2 February)

In addition, the following may apply:

  • Holders of an official degree awarded by a university in Spain or any other country in the European Higher Education Area, pursuant to the provisions of Article 16 of Royal Decree 1393/2007, of 29 October, which establishes official university course regulations, who have completed a minimum of 300 ECTS credits on official university degrees, of which at least 60 must be at the master's degree level.
  • Holders of an official Spanish bachelor’s degree comprising at least 300 credits, as provided for by EU regulations. Holder of degrees of this kind must complete bridging courses unless the curriculum of the bachelor’s degree in question included research training credits equivalent in value to those which would be earned on a master's degree.
  • Holders of an official university qualification who, having passed the entrance examination for specialised medical training, have completed at least two years of a training course leading to an official degree in a health-sciences specialisation.
  • Holders of a degree issued under a foreign education system. In these cases, homologation is not required, but the UPC must verify that the degree certifies a level of training equivalent to an official Spanish master's degree and qualifies the holder for admission to doctoral studies in the country where it was issued. Admission on this basis does not imply homologation of the foreign degree or its recognition for any purpose other than admission to doctoral studies.
  • Holders of a Spanish doctoral qualification issued under previous university regulations.
  • Note 1: Doctoral studies entrance regulations for holders of an undergraduate degree awarded before the introduction of the EHEA (CG 47/02 2014)

    Note 2: Governing Council Decision 64/2014, which approves the procedure and criteria for assessing the fulfilment of academic admission requirements for doctoral studies by holders of non-homologated foreign degrees (CG 25/03 2014)

Admission criteria and merits assessment

Admission to the programme takes place during the period established for this purpose by the academic calendar. Each application will be considered and assessed by the doctoral programme’s Academic Committee in accordance with the criteria presented hereafter. These criteria will serve to prioritise applications should the demand for seats exceed the offer. In any case, to be admitted to the programme, applicants must achieve a score of 60 out of 100.

Appropriateness of degree:

Organisational Engineering, Industrial Engineering or Logistics/Supply Chain: 30 points.

Other engineering degrees offering training in similar subject matters: 20 points.

Other engineering degrees without training in similar subject matters: up to 15 points.

Other degrees: up to 10 points.

University of origin:

Universities in the top third of noted international rankings: 30 points.

Universities present in some noted international rankings: between 10 and 20 points.

Universities not present in any noted international rankings: 0 points.

Academic transcript:

Equivalent to an A: 25 points.

Equivalent to a B: 10 points.

Equivalent to a C or less: 0 points.

Research experience:

Experience working with and having authored or co-authored scientific publications (articles or conferences): between 5 and 10 points.

Research experience without publications: between 2 and 4 points.

No research experience: 0 points.

Appropriateness of research interests with the programme’s main topics or lines of research (0-5 points):

Topic of interest coincides with one on the list: 5 points.

Topic of interest is related to at least one on the list: 2 points.

Topic of interest does not correspond to any on the list: 0 points.

• Supply chain management and design

• Operations management

• Integrated aggregate business planning

• Assembly line design and balancing

• Work time organisation

• Scheduling

• Urban logistics, inverse logistics (green logistics) and port logistics

• Decision support systems in sustainable energy

Training complements

The academic committee for the programme may require that doctoral students pass specific bridging courses. In this case, the Committee will monitor the bridging courses and set up appropriate criteria to limit their length.

The courses shall involve training in research, but in no case will candidates be required to enrol in 60 or more ECTS credits (as per the academic regulations for doctoral studies, bridging courses could also include transversal education, but this is likely to be changed to include only research-related credits, especially in cases of 300-ECTS-credit doctoral programmes).

Depending on the doctoral student activity report, the programme’s Academic Committee may propose measures, in addition to those established by current regulations, that would disassociate candidates who do not meet the established requisites.

Candidates without prior research experience must take (when enrolment is possible) and pass one of the following courses:

• Introduction to Research in Organisational Engineering, offered in the master’s programme in Organisational Engineering at the ETSEIB
• Research seminars in Organisational Engineering, offered in the master’s programme in Organisational Engineering at the ESEIAAT
• Introduction to Supply Chain Research, offered by the master’s programme in Supply Chain, Transport and Mobility at the ETSEIB/ETSECCPB

Furthermore, depending on the applicant’s background and research topic, his/her supervisor may suggest that the Academic Committee monitor and pass candidates in one or more of the courses offered in the related master’s programmes (in Organisational Engineering and in Supply Chain, Transport and Mobility). The Academic Committee will assess each case.

Enrolment period for new doctoral students

The period for new candidates to enrol takes place during the month of September.

More information at the registration section for new doctoral students

Enrolment period

The period for returning candidates to enrol takes place during the month of September and lasts until mid-October.

More information at the general registration section

Monitoring and evaluation of the doctoral student

Procedure for the preparation and defense of the research plan

Doctoral candidates must submit a research plan, which will be included in their doctoral student activity report, before the end of the first year. The plan may be improved over the course of the doctoral degree. It must be endorsed by the tutor and the supervisor, and it must include the method that is to be followed and the aims of the research.

At least one of these annual assessments will include a public presentation and defence of the research plan and work done before a committee composed of three doctoral degree holders, which will be conducted in the manner determined by each academic committee. The examination committee awards a Pass or Fail mark. A Pass mark is a prerequisite for continuing on the doctoral programme. Doctoral candidates awarded a Fail mark must submit a new research plan for assessment by the academic committee of the doctoral programme within six months.

The committee assesses the research plan every year, in addition to all of the other activities in the doctoral student activity report. Doctoral candidates who are awarded two consecutive Fail marks for the research plan will be obliged to definitely withdraw from the programme.

If they change the subject of their thesis, they must submit a new research plan.

Formation activities

Activity: Tutorial.
Hours: 288.
Type: compulsory.

Activity: Courses and seminars (specific to the programme).
Hours: 24.
Type: optional.

Activity: Publications.
Hours: 150.
Type: compulsory.

Activity: Mobility.
Hours: 480.
Type: optional.

Activity: Training in information skills.
Hours: 1.5.
Type: optional.

Activity: Research methodology.
Hours: 12.
Type: optional.

Activity: Innovation and creativity.
Hours: 8.
Type: optional.

Activity: Language and communication skills.
Hours: 18.
Type: optional.

Procedure for assignment of tutor and thesis director

The academic committee of the doctoral programme assigns a thesis supervisor to each doctoral candidate when they are admitted or enrol for the first time, taking account of the thesis supervision commitment referred to in the admission decision.

The thesis supervisor will ensure that training activities carried out by the doctoral candidate are coherent and suitable, and that the topic of the candidate’s doctoral thesis will have an impact and make a novel contribution to knowledge in the relevant field. The thesis supervisor will also guide the doctoral candidate in planning the thesis and, if necessary, tailoring it to any other projects or activities undertaken. The thesis supervisor will generally be a UPC professor or researcher who holds a doctoral degree and has documented research experience. This includes PhD-holding staff at associated schools (as determined by the Governing Council) and UPC-affiliated research institutes (in accordance with corresponding collaboration and affiliation agreements). When thesis supervisors are UPC staff members, they also act as the doctoral candidate’s tutor.

PhD holders who do not meet these criteria (as a result of their contractual relationship or the nature of the institution to which they are attached) must be approved by the UPC Doctoral School's Standing Committee in order to participate in a doctoral programme as researchers with documented research experience.

The academic committee of the doctoral programme may approve the appointment of a PhD-holding expert who is not a UPC staff member as a candidate’s thesis supervisor. In such cases, the prior authorisation of the UPC Doctoral School's Standing Committee is required. A UPC staff member who holds a doctoral degree and has documented research experience must also be proposed to act as a co-supervisor, or as the doctoral candidate’s tutor if one has not been assigned.

A thesis supervisor may step down from this role if there are justified reasons (recognised as valid by the committee) for doing so. If this occurs, the academic committee of the doctoral programme will assign the doctoral candidate a new thesis supervisor.

Provided there are justified reasons for doing so, and after hearing any relevant input from the doctoral candidate, the academic committee of the doctoral programme may assign a new thesis supervisor at any time during the period of doctoral study.

If there are academic reasons for doing so (an interdisciplinary topic, joint or international programmes, etc.) and the academic committee of the programme gives its approval, an additional thesis supervisor may be assigned. Supervisors and co-supervisors have the same responsibilities and academic recognition.

The maximum number of supervisors of a doctoral thesis is two: a supervisor and a co-supervisor.

For theses carried out under a cotutelle agreement or as part of an Industrial Doctorate, if necessary and if the agreement foresees it this maximum number of supervisors may not apply. This notwithstanding, the maximum number of supervisors belonging to the UPC is two.

More information at the PhD theses section

Permanence

The academic committee of the programme may authorise an extension of up to one year for full-time doctoral candidates who have not applied to deposit their thesis by the end of the three-year period of study, in the terms outlined in the Academic Regulations for Doctoral Studies of the Universitat Politècnica de Catalunya. In the case of part-time candidates, an extension of two years may be authorised. In both cases, in exceptional circumstances a further one-year extension may be granted by the Doctoral School's Standing Committee, upon the submission of a reasoned application by the academic committee of the doctoral programme.

A doctoral candidate may be dismissed from a doctoral programme for the following reasons:

  • The doctoral candidate submitting a justified application to withdraw from the programme.
  • The maximum period of study and of extensions thereof ending.
  • The doctoral candidate not having enrolled every academic year (unless he or she has been authorised to temporarily withdraw).
  • The doctoral candidate failing two consecutive assessments.
  • The doctoral candidate having disciplinary proceedings filed against him or her that rule that he or she must be dismissed from the UPC.

Dismissal from the programme implies that doctoral candidates cannot continue studying at the UPC and the closing of their academic record. This notwithstanding, they may apply to the academic committee of the programme for readmission and the committee must reevaluate them in accordance with the criteria established in the regulations.

International Mention

The doctoral degree certificate may include International Doctorate mention. In this case, the doctoral candidate must meet the following requirements:

a) During the period of study leading to the award of the doctoral degree, the doctoral candidate must have spent at least three months at a respected higher education institution or research centre outside Spain to complete courses or do research work. The stays and activities carried out must be endorsed by the thesis supervisor and authorised by the academic committee of the programme. The candidate must provide a certifying document issued by the person responsible for the research group of the body or bodies where the stay or activity was completed. This information will be added to the doctoral student’s activity report.
b) Part of the thesis (at least the summary and conclusions) must be written and presented in one of the languages commonly used for science communication in the relevant field of knowledge, which must not be an official language of Spain. This rule does not apply to stays and reports in Spanish or to experts from Spanish-speaking countries.
c) At least two PhD-holding experts belonging to a higher education institution or research centre outside Spain must have issued officially certified reports on the thesis.
d) The thesis examination committee must have included at least one PhD-holding expert from a higher education or research institution outside Spain who was not responsible for the candidate’s stay abroad (point a) above).
e) The thesis defence must have taken place on UPC premises or, in the case of joint programmes, at the location specified in the collaboration agreement.

Learning resources

The Department of Management, one of the entities sponsoring this programme, offers a workshop, a library and a computer room where candidates may work. The Institute of Industrial and Control Engineering, the other sponsoring entity, offers candidates a workshop, library and laboratories with sufficient equipment for students to complete their doctoral theses (Logistics Laboratory, Robotics Laboratory and the Control Laboratory).

Doctoral Theses

List of authorized thesis for defense

No hi ha registres per mostrar.

Last update: 04/10/2023 04:45:29.

List of lodged theses

  • ANDREU CASAS, ENRIC: Multi-manned Assembly Line Balancing Problem con tiempos de proceso dependientes (MALBP-DTT)
    Author: ANDREU CASAS, ENRIC
    Thesis file: (contact the Doctoral School to confirm you have a valid doctoral degree and to get the link to the thesis)
    Programme: DOCTORAL DEGREE IN SUPPLY CHAIN AND OPERATIONS MANAGEMENT
    Department: Department of Management (OE)
    Mode: Normal
    Deposit date: 29/09/2023
    Reading date: pending
    Reading time: pending
    Reading place: pending
    Thesis director: PASTOR MORENO, RAFAEL | GARCÍA VILLORIA, ALBERTO
    Committee:
         PRESIDENT: ANDRÉS ROMANO, CARLOS
         SECRETARI: DOMÉNECH LÉGA, BRUNO
         VOCAL: DE CASTRO VILA, RODOLFO
    Thesis abstract: The proposed PhD thesis consists in solving the Multi-manned Assembly Line Balancing Problem (MALBP). This type of assembly lines is common in the manufacture of large products, such as automobiles, in which different workers perform different tasks on the same work unit simultaneously.Most of the literature related to MALBP assumes that workers at the same station do not interfere with each other and that task processing times are deterministic and invariant. Nevertheless, few papers propose a variant in which processing times can be increased depending on workers at the station, which allows more realistic situations to be represented.The aim of the PhD thesis is to design exact and heuristic resolution procedures for the Multi-manned Assembly Line Balancing Problem with Dependent Task Times (MALBP-DTT) variant, which may be of interest to the scientific community and which improve the procedures already published in the literature up to now.Firstly, different procedures are developed with the aim of minimising the number of workers and stations to be assigned on the line, given a cycle time (time available at each station to complete the assigned tasks). This problem is mainly encountered in situations where it is required to design a new assembly line in terms of a known external demand. This PhD thesis proposes resolutions on the basis of a mathematical model, two Relax-and-Fix procedures, a heuristic based on solving a partition problem with constraints (named HEUR_PART) and a set of other variants of the HEUR_PART procedure. The computational experiments indicate that HEUR_PART and the HEUR_PART_SGL variant are the proposals that perform best.Furthermore, this PhD thesis applies Empirically Adjusted Greedy Heuristics (EAGH) and presents a new procedure (named EAGH-CKTL), which is based on using EAGH combined with the cocktail of heuristics concept. EAGH and EAGH-CKTL are used to design new priority rules for solving MALBP-DTT through the HEUR_PART steps. In particular, EAGH-CKTL is applied for building new priority rules that have a good performance as part of a cocktail of heuristics. The computational experiments show the efficiency of using both EAGH and EAGH-CKTL in the process of designing efficient priority rules: one of the priority rules designed with EAGH presents a better performance than any other rule proposed in HEUR_PART; while another rule, designed with EAGH-CKTL, evidences a remarkable improvement in the HEUR_PART results when added in its cocktail of heuristics.Moreover, new heuristics that also solve a partition problem with constraints are developed. Two procedures are designed: MULTI_HEUR_PART, based on solving a combined partition problem; and OPWK_PART, based on generating neighbouring stations by means of task swaps and transfers. OPWK_PART is the procedure which obtains the best results, compared both with the other proposed procedures for solving the same problem and with any other procedure that has been published in the literature for this variant up to now.A second problem to be solved for multi-manned assembly lines is to produce the highest number of workpieces using a fixed number of workstations. In the second part of the thesis this kind of problem is addressed for the first time in the literature: the MALBP-DTT with the objective of minimising the cycle time. For this purpose, a mathematical model is presented. Furthermore, two heuristics based on solving a partition problem with constraints are developed: HEUR_CT_PART and OPCT_PART. In particular, OPCT_PART uses a greedy constructive heuristic procedure, named GRDY_DTT2, and combines the resolution of a partition problem with the generation of neighbouring workstations by task swaps and transfers. The computational experiments indicate that OPCT_PART is the proposal that performs best. Additionally, it is shown that OPCT_PART obtains better results than the ones published in the literature for the MALBP with the same objec

Last update: 04/10/2023 04:30:30.

List of defended theses by year

  • GALLEGUILLOS POZO, ROSA ELIZABETH: Diseño de sistemas de electrificación autónomos para comunidades rurales considerando incertidumbre en la estimación de la demanda.
    Author: GALLEGUILLOS POZO, ROSA ELIZABETH
    Thesis file: (contact the Doctoral School to confirm you have a valid doctoral degree and to get the link to the thesis)
    Programme: DOCTORAL DEGREE IN SUPPLY CHAIN AND OPERATIONS MANAGEMENT
    Department: Institute of Industrial and Control Engineering (IOC)
    Mode: Normal
    Reading date: 19/06/2023
    Thesis director: DOMÉNECH LÉGA, BRUNO | FERRER MARTI, LAIA

    Committee:
         PRESIDENT: VITORIANO VILLANUEVA, BEGOÑA
         SECRETARI: PONSICH, ANTONIN SEBASTIEN
         VOCAL: MORA FLOREZ, JUAN JOSÉ
    Thesis abstract: The United Nations objective to ensure energy access for all is still far from being achieved, particularly in rural areas of developing countries. In order to expand access to electricity, isolated systems, either individual or microgrid, mainly based on renewable energy sources (wind-solar) are being promoted. However, the design these systems is a complex problem, as a variety of locations and sizes of generators have to be considered, as well as all possible connections between demand points. In addition, the design is subject to uncertainties in estimating the demand for previously non-electrified populations, which can have a significant impact on the cost of the projects.In this context, the main objective of this thesis is to solve the problem of designing wind-solar systems with microgrids and individual supplies, taking into account the uncertainty in demand. To this end, a fuzzy mixed integer linear programming model (MILP) is proposed to provide rural electrification promoters in developing countries with a simple tool to design electricity access projects. In particular, different fuzzy-based approaches are compared to identify the most efficient one to balance the cost of the project and the satisfaction of end users with the demand supplied.More specifically, after analyzing the problem of uncertainty in demand, it is determined that the most appropriate way to model this situation is to define two scenarios: an essential demand, to meet the basic needs of end users, and an increased demand, above which solutions would be too expensive. Thus, five fuzzy MILP approaches are developed, considering different options to balance the satisfaction regarding the cost, energy and peak power. To determine the best approach, first a basic model is developed to facilitate computational experiments, and then a complete model including all elements of the electrical systems is developed. The experiments are applied to real cases of three Latin American countries (Ecuador, Mexico and Peru) and the results show that the best fuzzy MILP approach achieves an adequate balance between the cost and the demand supplied, in a much simpler way than it would be done with the deterministic models of the literature.As a result of this thesis, promoters have a decision support tool for implementing projects in developing countries, which allows them to obtain robust solutions that do not depend on the exact estimation of demand.

Last update: 04/10/2023 05:01:11.

Theses related publications

AUTHOR:AGUILAR GAMARRA, HARRY - NICK
Title:Equilibrado de líneas de montaje en paralelo con estaciones multilínea y dimensionado de buffers
Reading date:18/11/2022
Director:PASTOR MORENO, RAFAEL
Co-director:GARCÍA VILLORIA, ALBERTO
Mention:No mention
RELATED PUBLICATIONS
A survey of the parallel assembly lines balancing problem
Aguilar, H.; García-Villoria, A.; Pastor, Rafael
Computers & operations research, ISSN: 0305-0548 (JCR Impact Factor-2020: 4.008; Quartil: Q2)
Publication date: 12/2020
Journal article

Existence and sizing of buffers in parallel assembly lines with multi-line workstations and different cycle times
Aguilar, H.; Pastor, Rafael; García-Villoria, A.
Dyna management, ISSN: 2340-6585 (JCR Impact Factor-2021: 0.0
Publication date: 21/04/2021
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Mathematical models for buffer sizing problems in parallell assembly lines with multi-line stations and different cycle times
Aguilar, H.; García-Villoria, A.; Pastor, Rafael
Dyna (Bilbao), ISSN: 1989-1490 (JCR Impact Factor-2021: 2.07; Quartil: Q3)
Publication date: 01/11/2021
Journal article

AUTHOR:JUANPERA GALLEL, MARC
Title:Methodology for the evaluation and design of projects considering multiple criteria and uncertainty. Application to the development of energy projects in rural areas
Reading date:20/12/2021
Director:PASTOR MORENO, RAFAEL
Co-director:FERRER MARTI, LAIA
Mention:International Mention
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