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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...
Persistent link: https://www.econbiz.de/10011737088
Three types of multi-item capacitated dynamic lotsizing and scheduling models are well established until now: The capacitated lotsizing problem, the discrete lotsizing and scheduling problem as well as the continuous setup lotsizing problem. An analysis of the underlying fundamental assumptions...
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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...
Persistent link: https://www.econbiz.de/10011739121
Lotsizing and scheduling comprises activities which have to be done repeatedly within MRP-systems. First, we show via a simple example the deficiencies arising within the MRP-context by neglecting the interrelationships of multi-stage systems. Second, we propose a new model for multi-item,...
Persistent link: https://www.econbiz.de/10011739300
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...
Persistent link: https://www.econbiz.de/10011743703
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...
Persistent link: https://www.econbiz.de/10011744372
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...
Persistent link: https://www.econbiz.de/10011744374