Now showing items 19-38 of 50

  • Gestión de proyectos TIC: modelo de formación para PYMES 

    Giralt Mas, Ma. Rosa; Companys Pascual, Ramón; Palà Schönwälder, Pere (Asociación Española de Ingeniería de Proyectos, 2010)
    Conference lecture
    Open Access
    La realización de proyectos en empresas es una de sus actividades fundamentales, aunque la clave de su éxito es una buena gestión. Al constatar que algunas pymes no acostumbraban a llevar a cabo una correcta gestión de ...
  • Hybrid metaheuristics for the tardines blocking flow shop problem 

    Ribas Vila, Immaculada; Companys Pascual, Ramón; Tort-Martorell Llabrés, Xavier (2012-09-04)
    External research report
    Open Access
    This paper proposes an Iterated Local Search (ILS) procedure and an Iterated Greedy (IG) algorithm, which are both combined with a variable neighbourhood search (VNS), for dealing with the flow shop problem with blocking, ...
  • Improvement tools for NEH based heuristics on permutation and blocking flow shop scheduling problems 

    Companys Pascual, Ramón; Ribas Vila, Immaculada; Mateo Doll, Manuel (Springer, 2010-12-01)
    Part of book or chapter of book
    Restricted access - publisher's policy
    In this paper, two tools to improve the performance of the NEH-based heuristics for the flow shop problem with and without buffer constraints are proposed. The first tool is the use of the reversibility property of the ...
  • Improvement tools for NEH based heuristics on permutation and blocking flow-shop scheduling problems 

    Companys Pascual, Ramón; Ribas Vila, Immaculada; Mateo Doll, Manuel (2009-09-19)
    Conference report
    Restricted access - confidentiality agreement
    In this paper, two tools to improve the performance of the NEHbased heuristics for the flow shop problem with and without buffer constraints are proposed. The first tool is the use of the reversibility property of ...
  • Johnson revisited, ten years later 

    Companys Pascual, Ramón; Ribas Vila, Immaculada (2009-09-02)
    Conference report
    Open Access
  • Modelo de localización de servicios de extinción de incendios 

    Cobes Moreno, Ana María; Companys Pascual, Ramón (Universitat Politècnica de Catalunya. Centre de Càlcul, 1991)
    Article
    Open Access
    El modelo propuesto es un modelo lineal de recubrimiento, permite varias categorías de parques, limitaciones de capacidad y de infrautilización, un r-cubrimiento para las celdas que se especifiquen, y una ponderación de ...
  • n-Cyclic Hoist Scheduling Problem to manufacture more than 2 products 

    Mateo Doll, Manuel; Companys Pascual, Ramón (2012-07-27)
    External research report
    Open Access
    Jobs of more than two products (n>2) must be manufactured in a production line of tanks. A hoist transports the jobs between tanks. If the size of both batches is equal and the number of jobs is high, a cyclic scheduling ...
  • New best solutions for the blocking flow shop problem 

    Companys Pascual, Ramón; Ribas Vila, Immaculada (2011-01-03)
    External research report
    Open Access
  • New computational experiences on the Hoist Scheduling Problem for cyclic manufacturing of different products. 

    Mateo Doll, Manuel; Companys Pascual, Ramón (2007-01)
    External research report
    Open Access
    Jobs of two products must receive the same treatments in a production line of tanks. If the size of both batches is equal, we propose a cyclic manufacturing composed of a job from batch 1 and a job from batch 2. A hoist ...
  • New insights on the blocking flow shop problem 

    Companys Pascual, Ramón; Ribas Vila, Immaculada (2010-02-01)
    External research report
    Open Access
    We present some results attained with different algorithms for the Fm|block|Cmax problem using as experimental data the well-known Taillard instances.
  • New insights on the blocking flow shop problem best solutions updated. Vol.5 

    Companys Pascual, Ramón; Ribas Vila, Immaculada (2011-02-01)
    External research report
    Open Access
  • New insights on the blocking flow shop problem best solutions updated. Vol.6 

    Companys Pascual, Ramón; Ribas Vila, Immaculada (2011-11-11)
    External research report
    Open Access
    This paper is the 5th updated version of “New insights on the blocking flow shop problem” (January 2010). Each release updates the solutions of precedent releases The values of the 2nd release (February 2010) were reproduced ...
  • New insights on the blocking flow shop problem best solutions updated. Vol.7 

    Companys Pascual, Ramón; Ribas Vila, Immaculada (2012-04-30)
    External research report
    Restricted access - author's decision
    Best solutions of taillard instances viewed as Fm|Block|Cmax problem instances.
  • Newinsights on the blocking flow shop problem best solutions updated 

    Companys Pascual, Ramón; Ribas Vila, Immaculada (2010-12-13)
    External research report
    Open Access
    update of the best solution for Taillard's instances on the blocking flow shop problem
  • Note on the behaviour of an improvement heuristic on permutation and blocking flow-shop scheduling 

    Companys Pascual, Ramón; Ribas Vila, Immaculada; Mateo Doll, Manuel (2010)
    Article
    Restricted access - publisher's policy
    This work deals with the permutation flow-shop scheduling problem with and without storage space between stages, where the performance criterion is the makespan. Many proposed procedures to solve these problems have an ...
  • Note on the blocking flow shop problem 

    Companys Pascual, Ramón (2009-06-20)
    Working paper
    Open Access
    We present some results attained with different algorithms for the Fm|block|Cmax problem using as experimental data the well-known Taillard instances.
  • On tie-breakers and other exotic Tools for the NEH Algorithm 

    Companys Pascual, Ramón; Ribas Vila, Immaculada (2010-02-01)
    External research report
    Open Access
    Este es el primero de tres trabajos dedicados a procedimientos de resolución de los problemas flowshop con criterio minimización del makespan, basados en la clásica heurística de Nawaz, Enscore y Ham. Consideramos dos casos ...
  • Planificación estratégica de la capacidad en una empresa del sector limentación 

    Companys Pascual, Ramón; Ribas Vila, Immaculada; Bautista Valhondo, Joaquín (2012-10-11)
    Article
    Open Access
    En esta comunicación se describe el procedimiento propuesto a una empresa del sector de la alimentación para planificar la capacidad productiva de las diferentes plantas aprovechando el cambio de ubicación forzoso de una ...
  • Presentació 

    Companys Pascual, Ramón (Centre de Recerca per a la Història de la Tècnica "Francesc Santponç i Roca", 2001)
    Review
    Open Access
  • Previsions i estocs 

    Companys Pascual, Ramón (Universitat Politècnica de Catalunya, 1993)
    Book
    Restricted access to the UPC academic community
    Ajust amb tendència lineal i estacionalitat. Ajust de corbes de tendència amb saturació. L'estrany cas del tracking signal. Una mirada a la teoria clàssica de la gestió d'estocs. El problema ELSP. Demanda variable i termini ...