Now showing items 1-9 of 9

    • Dynamic lot sizing and tool management in automated manufacturing systems 

      Aktürk, M. S.; Önen, S. (Elsevier, 2002)
      The overall aim of this study is to show that there is a critical interface between the lot sizing and tool management decisions, and these two problems cannot be viewed in isolation. We propose "ve alternative algorithms ...
    • Dynamic lot sizing for a warm/cold process: heuristics and insights 

      Toy, A. Ö.; Berk, E. (Elsevier, 2013-09)
      We consider the dynamic lot sizing problem for a warm/cold process where the process can be kept warm at a unit variable cost for the next period if more than a prespecified quantity has been produced. Exploiting the ...
    • Integrated lot sizing and tool management in automated manufacturing systems 

      Aktürk, Mehmet Selim; Önen, Siraceddin (IIE, 1997)
      We propose a new algorithm to solve lot sizing, tool allocation and machining conditions optimization problems simultaneously to minimize total production cost in a CNC environment. Most of the existing lot sizing and tool ...
    • Joint lot sizing and tool management in a CNC environment 

      Aktuük, M. S.; Önen, S. (Elsevier, 1999)
      We propose a new algorithm to solve lot sizing, tool allocation and machining conditions optimization problems simultaneously to minimize total production cost in a CNC environment. Most of the existing lot sizing and tool ...
    • Lot sizing with nonlinear production cost functions 

      Koca, Esra (Bilkent University, 2015-07)
      In this study, we consider di erent variations of the lot sizing problem encountered in many real life production, procurement and transportation systems. First, we consider the deterministic lot sizing problem with ...
    • Lot sizing with perishable items 

      Arslan, Nazlıcan (Bilkent University, 2019-07)
      We address the uncapacitated lot sizing problem for a perishable item that has a deterministic and fixed lifetime. In the first part of the study, we assume that the demand is also deterministic. We conduct a polyhedral ...
    • Lot sizing with piecewise concave production costs 

      Koca, E.; Yaman, H.; Aktürk, M. S. (Institute for Operations Research and the Management Sciences (I N F O R M S), 2014)
      We study the lot-sizing problem with piecewise concave production costs and concave holding costs. This problem is a generalization of the lot-sizing problem with quantity discounts, minimum order quantities, capacities, ...
    • A polyhedral study of multiechelon lot sizing with intermediate demands 

      Zhang, M.; Küçükyavuz, S.; Yaman, H. (Institute for Operations Research and the Management Sciences (I N F O R M S), 2012)
      In this paper, we study a multiechelon uncapacitated lot-sizing problem in series (m-ULS), where the output of the intermediate echelons has its own external demand and is also an input to the next echelon. We propose a ...
    • Production decisions with convex costs and carbon emission constraints 

      Kian, Ramez (Bilkent University, 2016-03)
      In this thesis, di erent variants of the production planning problem are considered. We rst study an uncapacitated deterministic lot sizing model with a nonlinear convex production cost function. The nonlinearity and ...