Integration of Lean Con. and Building Information Modelling
He also understood that the scheduling of work should not be driven by
sales and production targets, but by actual sales. This created the need for "pull" system.
Engineer Ohno saw waste in every step of the conventional production system. If conventional
production management is about producing as many cars as possible in the shortest feasible time
(which is exactly the case in mass production), then Ohnos system is about making perfect cars (by
decentralizing the decision making process, Jidoka7) in a flexible way and in the shortest time with
nothing in inventory. It means that work stops if there are no orders from customers. The most difficult
problem involved supplying production with the necessary bulk materials. In particular, it made
planning and organizing the production system very important.
As he became aware of waste reduction in production, he understood that decisions made in the design
phase affect cost and the sophistication of the execution phase
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