With reference to the research findings in the multi-
products Hybrid system, a larger kanban size often leads to the result of higher average fill
rate, and lower average manufacturing lead time. Contrarily, a smaller kanban size needs more
frequent machine set-up, thus the non-produc- tive time is increased significantly. In other
words, for a larger kanban size situation, the productive time in normal working hours can be
maximized, and the factory may probably benefit from savings such as the reduction of labour
hours in overtime production, and energy. However, a fill rate of over 100% is not desired.
Therefore, the kanban
size needs to be controlled within limits.