how to prove that lean process is efficient?

by Alvin
(U.S.)

Could you prove the lean process is efficient by using numbers? For example, how many percentages of cost are reduced each year for Toyota?

Answer from Process Improvement Japan:
A conservative estimate is that Toyota saves $3 Billion dollars annually due to kaizen related activities. This figure does not take into account the innovative developments created by lean processes and kaizen activities.

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Nov 13, 2013
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Cost Savings Target
by: Andrew

Does Toyota have a % cost savings target every year? Do they assign a % cost savings target from kaizen/5S activities?

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