Comparison of order systems in a hybrid manufacturing environment.
Report 99.3.LT.5215, Transport Technology, Logistic Engineering.
This document is the result of an assignment of the faculty of Mechanical
Engineering at the TU Delft that aims to present an application of JAVA as
This application concerns a simulation program that compares the performance
of different order systems in a hybrid manufacturing environment.
A hybrid manufacturing system uses two production processes to end up with the
finished (serviceable) goods: manufacturing and remanufacturing.
The input at manufacturing is raw material that is assembled and transformed to
the end product.
At the other hand, remanufacturing uses as input returned goods that after
inspection (to assess the quality) are upgraded to serviceable goods that
are not inferior to the end products of the manufacturing process.
It is obvious that the production control of a hybrid manufacturing system
is more complex than in the case of conventional production systems. The
environment of a hybrid manufacturing system implies much more uncertainties
(return rate of used products, inspection results) than the conventional
A thesis of Van der Laan [E. van der Laan The effects of
Remanufacturing on Inventory Control, doctoral dissertation
Erasmus University Rotterdam, Nr. 28 of PhD-series 'In general
management', Eburon, Delft (1997)] treated the problem of production
control in a hybrid manufacturing system. Van der Laan discussed in his
thesis some variants of a certain order system that we call the Van der
Laan-system. This system is discussed later in this document.
In this thesis the performance of the Van der Laan-system will be compared
to the so-called Silver-Meal-system. In contrast with the Van der
Laan-system, the Silver-Meal-system is a very simple order system.
A simulation program has been developed in JAVA to compare the performance
of both order systems.
In the design of the JAVA program that was written for this assignment,
benefit is taken from the object-oriented structure of JAVA.
Simple objects have been constructed which reflect reality. The concept of
inheritance is used to avoid the multiple definition of similar object
structures in the program.
It resulted in a clear and flexible program.
Reports on Logistic Engineering (in Dutch)
, TU Delft