• Hybrid metaheuristics for the tardines blocking flow shop problem 

    Ribas Vila, Immaculada; Companys Pascual, Ramón; Tort-Martorell Llabrés, Xavier (2012-09-04)
    Report de recerca
    Acceso abierto
    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)
    Capítulo de libro
    Acceso restringido por política de la editorial
    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)
    Texto en actas de congreso
    Acceso restringido por acuerdo de confidencialidad
    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)
    Texto en actas de congreso
    Acceso abierto
  • Local search heuristics for the assembly line balancing problem with incompatibilities between tasks 

    Bautista Valhondo, Joaquín; Suárez Feijóo, Raúl; Mateo Doll, Manuel; Companys Pascual, Ramón (Institute of Electrical and Electronics Engineers (IEEE), 2000-04-24)
    Capítulo de libro
    Acceso restringido por política de la editorial
    This paper deals with the assembly line balancing problem considering incompatibilities between the tasks with the aim of: first minimizing the number of workstations, and then minimizing the cycle time for the minimum ...
  • Modelo de localización de servicios de extinción de incendios 

    Cobes Moreno, Ana María; Companys Pascual, Ramón (Universitat Politècnica de Catalunya. Centre de Càlcul, 1991)
    Artículo
    Acceso abierto
    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)
    Report de recerca
    Acceso abierto
    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)
    Report de recerca
    Acceso abierto
  • New computational experiences on the Hoist Scheduling Problem for cyclic manufacturing of different products. 

    Mateo Doll, Manuel; Companys Pascual, Ramón (2007-01)
    Report de recerca
    Acceso abierto
    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)
    Report de recerca
    Acceso abierto
    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)
    Report de recerca
    Acceso abierto
  • New insights on the blocking flow shop problem best solutions updated. Vol.6 

    Companys Pascual, Ramón; Ribas Vila, Immaculada (2011-11-11)
    Report de recerca
    Acceso abierto
    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)
    Report de recerca
    Acceso restringido por decisión del autor
    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)
    Report de recerca
    Acceso abierto
    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)
    Artículo
    Acceso restringido por política de la editorial
    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
    Acceso abierto
    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)
    Report de recerca
    Acceso abierto
    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)
    Artículo
    Acceso abierto
    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)
    Reseña
    Acceso abierto
  • Previsions i estocs 

    Companys Pascual, Ramón (Universitat Politècnica de Catalunya, 1993)
    Libro
    Acceso restringido a la comunidad UPC
    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 ...