This paper presents a new stage-of-fabrication inventory model with ordering usage and stocking of input materials that distinguishes between gross production and value added It extends the traditional linear-quadratic model of output (finished goods) inventories by adding joint determination of...

One of the basic assumptions of the classical dynamic lot-sizing model is that theaggregate demand of a given period must be satisfied in that period. Under thisassumption, if backlogging is not allowed then the demand of a given period cannotbe delivered earlier or later than the period. If...

Zur Lösung des Economic Lot Scheduling Problems (ELSP) finden sich in der Literatur drei Ansätze mit unterschiedlich einschränkenden Annahmen: - Ansatz des gemeinsamen Produktzyklus (Common-Cycle-Approach) - Ansatz der gemeinsamen Basisperiode (Basic-Period-Approach) - Ansatz der variierenden...

Produktionsplanungs- und -steuerungssysteme (PPS-Systeme) haben in den letzten Jahren in der wissenschaftlichen Literatur und der betrieblichen Praxis starke Beachtung gefunden. Während diese Systeme die Problematik der (Groß-) Serienfertigung (einigermaßen) bewältigen, sind sie für die...

While the basic economic order quantity model has found some practical applications, it makes a number of assumptions which do not reflect most real life inventory systems. This paper proposes an inventory system where the items ordered are capable of growing during the course of the inventory...

We consider an economic order quantity model where the supplier offers an all-units quantity discount and a price sensitive customer demand. We compare a decentralized decision framework where selling price and replenishment policy are determined independently to simultaneous decision making....

Background: The remanufacturing plan of perfect cost makes reference to the remanufacturing plan of an optimal solution of the economic lot-sizing problem with remanufacturing (ELSR). In this paper, we address the problem of determining the quantities of the remanufacturing plan of perfect cost...

This contribution presents an efficient solution method for solving the major short-term planning problems which occur, if lot production has to be managed. In our focus are the two most important aspects, i.e. lot sizing and scheduling. Since both problems heavily interact, we propose an...

The "Capacitated lot sizing problem with setup carry-over" is based ort the well known "Capacitated lot sizing problem" and incorporates the possibility of preserving a setup-state from a period to the following. Sox and Gao [2] decompose their formulation of the first one (GCLP1) by Lagrangian...

This paper presents an optimization-based solution approach for the dynamic multi-level capacitated lot sizing problem (MLCLSP) with positive lead times. The key idea is to solve a series of mixed-integer programs in an iterative fix-and-optimize algorithm. Each of these programs is optimized...