Airline rescheduling is a relatively new field in airline Operations Research but increasing amounts of traffic will make disturbances to the original schedule more frequent and more severe, and thus the need to address the various problems arising from this situation with systematic,...

Sales force deployment involves the concurrent resolution of four interrelated subproblems: sizing the sales force, salesman location, sales territory alignment, and sales resource allocation. The first subproblem addresses the topic of selecting the appropriate number of salesman. The salesman...

We present a model for the vehicle and crew scheduling problem in urban public transport Systems by combining models for vehicle and crew scheduling that cover a great variety of real world aspects, especially constraints for crews resulting from wage agreements and internal regulations. The...

Lufthansa Technical Training GmbH (LIT) performs training courses for Lufthansa AG as well as for several other international airlines. Courses of about 670 different types are offered of which several hundred take place each year. The course scheduling problem faced by LTT is to develop a...

In diesem Beitrag zeigen wir, wie die Planungsqualität in einem Unternehmen durch die Integration der Ablaufplanung in die Losgrößenplanung erheblich gesteigert wurde. Gegenstand der Untersuchung war eine Fräsmaschine mit reihenfolgeabhängigen Rüstkosten und Rüstzeiten, wobei für einige...

This paper deals with lot sizing and scheduling for a single-stage production System where setup costs and times are sequence dependent. A large bücket mixed integer programming (MIP) model is formulated which considers only efficient sequences. A tailor-made enumeration method of the...

Im Rahmen der 1995 erfolgten Umstrukturierung der Deutschen Lufthansa AG sind aus einzelnen Unternehmensbereichen selbständige Tochterunternehmen entstanden. Hierzu gehört auch die Lufthansa Technical Training GmbH (LTT) mit Schulungseinrichtungen in Berlin, Frankfurt und Hamburg. Kunden der...

Lotsizing and scheduling comprises activities which have to be done repeatedly within MRP-systems. We consider the proportional (multi-item, capacitated, dynamic) lotsizing and scheduling problem which is more general than the discrete lotsizing and scheduling problem as well as the continuous...

Die Losgrößen- und Ablaufplanung stellt ein in PPS-Systemen wiederholt zu lösendes Problem dar. Wir zeigen zunächst mit Hilfe eines einfachen Beispiels, welche Probleme aus der Vernachlässigung der Abhängigkeiten innerhalb einer mehrstufigen Erzeugnisstruktur entstehen. Anschließend...