Oct 29 2019
The Manga Style In The Japanese Literature On Manufacturing
A unique characteristic of the Japanese literature on manufacturing is its use of comic strips — or manga — to communicate with readers. The subject came up in a recent discussion on LinkedIn, that Mark DeLuzio started by saying:
“Toyota has been given credit for making the complex simple. Some say that this is the definition of genius. I think that the Lean consulting industry, in their attempt to help others follow Toyota’s footsteps, has in many cases done the opposite. We have made the simple very complex.”
My comment was that, while expressed in jargon, most of what goes as “Lean” in the US is simplistic. I contrast it with what I found in Japan, like the Kojo Kanri (工場管理, or “Factory Management”) monthly. It is full of case studies communicated in manga, on subjects ranging from the strategic to the tactical.
Apr 16 2021
Measuring QC Efficacy: A Proposal
As Jay Bitsack pointed out in his comments on LinkedIn about my previous post, the portability of a method from epidemiology to manufacturing quality is not a foregone conclusion. Formally, the logic of validating a vaccine seems applicable to the solution of a quality problem. They look similar when you consider only outcomes in terms of infection rates or the proportion of defectives.
There are differences between data sets from a clinical trial and tests run before and after a process change in production that may affect the applicability of a method. We examine the conditions for the approach developed by Carlo Graziani for vaccine efficacy to cross over to quality control. Then we work out the math of Graziani’s method and the means to apply it.
Continue reading…
Share this:
Like this:
By Michel Baudin • Laws of nature • 0 • Tags: Bayesian Statistics, Efficacy, Manufacturing, Quality, Quality Assurance, Quality Control