Understanding production systems through human simulation: Experiencing JIC (Just-in-Case), JIT (Just-in-Time) and OPT (Optimised-Production-Technology) production systems
Computer Information Systems
The just-in-case (JIC) system is a push system. In many companies, materials and parts are pushed from one process to the next to guard against bringing the production line or system to a halt. A just-in-time (JIT) production system is an integrated manufacturing and supply system aimed at eliminating waste and producing the highest quality and the lowest cost products. Its advantages include: 1. shortening lead-time, 2. reducing time spent on nonprocessing work, 3. providing better balancing processes, and 4. reducing poor quality products. Optimized production technology (OPT) is a procedure to schedule work centers with finite loading. To improve student comprehension in a Production/Operations Management course, these 3 production/inventory control systems are simulated through a human simulation called a production walk. Throughput time is equal to the time between the first person leaving and the last person returning. Work-in-process inventory is the amount of the walk between the first and the last person.
Wu, N. L. (1989). Understanding production systems through human simulation: Experiencing JIC (Just-in-Case), JIT (Just-in-Time) and OPT (Optimised-Production-Technology) production systems. International Journal of Operations & Production Management, 9 (1), 27–34. doi:10.1108/EUM0000000001215