Earlier I wrote about MRP as an push production and JIT as an pull production. In reality they seldom are this black and white but it is some kind of mix of these push and pull production.
Production time at workstation can be divided into following categories: Transfer time Queue time Setup time Process time Wait-to-bath time Wait-in-batch time Wait-to-match time
Lean is based on the thought that excess work (muda) needs to be removed. So we can lead this into the variation removing. We must still remember that variation can also be good if it’s our strategic decision.
Term LEAN appeared for the first time in 1988 or 1990 depending on sources. But actually LEAN was only new term for JIT philosophy and afterthought it was just simplier and prettier form of JIT. Next book about Toyota and LEAN didn’t appear until 1996.
Kanban is often heard in discussions when talking about Japanese JIT philosophy. Most common translation for kanban is card. In Toyota’s factory cards were big part of managing the material flow.
JIT is acronym for Just in Time. It is created in Japan at 1900’s when Japanese tried to compete with Americans. Japanese labor productivity was only one-ninth of the Americans so they had to do something differently. Most of the JIT practices comes from Toyota.
In orderd to manage global competition, enterprise must succeed in at least one of these dimensions: