The attraction of tools is that they can be employed at many points within an organization, often by staff improvement teams or external consultants. Even better, they can be applied in isolation without tackling the difficult task of changing the organization and the fundamental approach to management. I often say that managers will try anything easy that doesn’t work before they will try anything hard that does, and this may be a fair summary of what happened in the Tool Age
…
Teach all managers to ask questions about their value streams (rather than giving answers and orders from higher levels). Turn these questions into experiments using Plan-Do-Check-Act.

Only management by science through constant experimentation to answer questions can produce sustainable improvements in value streams. ( Toyota’s A3 is a wonderful management tool for putting science to work.)