Library / Concept
Statistical process control
Instrumentation instead of opinion, since 1924.
TypeConcept: an idea the canvas inherits
Related entriesDeming, and plan-do-study-act, The human oversight duty
Sources, and how strong they are
Primary source
Walter Shewhart, Economic Control of Quality of Manufactured Product
1931; first control chart 1924
Shewhart's control chart separates variation inherent in a process from variation caused by a specific event. It is the origin of the idea that you should measure a system before you have views about it.
It sits in Evidence because the modern requirement, that a system produce its own trail as a byproduct of running rather than assembling one before an audit, is the same idea applied to agents.
10Evidence
What would you show an auditor, and can the system produce it without being asked?
08Learning
How does tacit judgment become reusable, and who owns the loop that has to close?
Correct this entryCorrections are made in public and credited by name.
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