The JIT production systems have been a focus of interest to researchers. Although there are numerous simulation studies analyzing and evaluating the JIT system in a stochastic environment, experimental design studies on the multi-item, multi-line, multi-stage JIT systems are not performed in depth. This paper aims to explicitly examine the performance of a multi-item, multi-line, multi-stage JIT system and to show how this system reacts under different factor settings. This system is modeled in SLAM II, which is a FORTRAN-based simulation language. Experimental results are reported and further research direction is given. (C) 1998 Elsevier Science B.V,All rights reserved.