Embracing instability

Kaizen is largely a drive toward stability – that is a more consistent operation, producing a more consistent result. The key is the definition of “consistent.” Overproduction is a way to achieve the illusion of consistency in the face of inherently unstable operations. Your machines are unreliable? Run faster when you can run. Inconsistent quality? …

5S With Purpose

The team was driving toward a consistently executed changeover process as a target condition. In the last iteration, the process was disrupted by a scrapped first-run part. The initial level cause was an oversize bit in the NC router resulting in an out-of-spec trim and oversize holes. This occurred in spite of the fact that …

Mike Rother: Time to Retire the Wedge

Note – this post was written pretty much simultaneously with a post on the lean.org forum. Mike Rother has put up a compelling presentation that highlights a long-standing misunderstanding about the purpose of “standards.” Some time ago, a (well-meaning) author or consultant constructed a graphic that shows the PDCA wheel rolling up the incline of …