Yes indeed, they ares still used. But as mentioned in Part 1 graphic / image used, the Shewhart Control Chart and at Tokai Rikka have the U/LCL in dotted lines, never full lines as the lines show very well and your process behavior exapmples, it varies.
Secondly and kind of worse is placing the U/LSL lines (Full of course) on the Control Chart. As Shewhart, Deming, Ishikawa, Juran, Wheeler, AIAG "SPC" text told and tell us, Control Charts Economic CL - dotted; Histogram U/LSL - Full.
How the process behavs then and subsequent capabilities can be so determined meaning Stability before Capability.
My joy was seeing little Ishikawa Basic C&E Diagrams on the Clayton Melbourne Australia, Opama Japan and Smyna Tenn USA NIssan Plants and vehicle Control Chart "Outliers" and then again in the Toyota Hi-Ace plants, using CC and HIstograms as I stated.
When the process was really unstable they showed me very well, Dr IShikawa's 3rd Type of Cause Analysis (Introduction to QC ~1962) the Process Classification Cause & Effect Diagram. As all work happens through a process, it is very useful.
Another joy is seeing CC used in banks, insurance companies and in defense procurements / supply charts. As Mr Toyoda and his engineers told the Cadilac VP after they toured the robot Cadliac line and she presented and told us the story at the Quality Conference in Canada. He queried her on solving problems and so few people to solve them, plus so many robotocs etc. He said that if you do not control your processes, with your people, 'I fear you will only make what you do, badly, quicker'. GM had to write-off so much of their then Captial Investment.
G'day Scott and Douglas,
Yes indeed, they ares still used. But as mentioned in Part 1 graphic / image used, the Shewhart Control Chart and at Tokai Rikka have the U/LCL in dotted lines, never full lines as the lines show very well and your process behavior exapmples, it varies.
Secondly and kind of worse is placing the U/LSL lines (Full of course) on the Control Chart. As Shewhart, Deming, Ishikawa, Juran, Wheeler, AIAG "SPC" text told and tell us, Control Charts Economic CL - dotted; Histogram U/LSL - Full.
How the process behavs then and subsequent capabilities can be so determined meaning Stability before Capability.
My joy was seeing little Ishikawa Basic C&E Diagrams on the Clayton Melbourne Australia, Opama Japan and Smyna Tenn USA NIssan Plants and vehicle Control Chart "Outliers" and then again in the Toyota Hi-Ace plants, using CC and HIstograms as I stated.
When the process was really unstable they showed me very well, Dr IShikawa's 3rd Type of Cause Analysis (Introduction to QC ~1962) the Process Classification Cause & Effect Diagram. As all work happens through a process, it is very useful.
Another joy is seeing CC used in banks, insurance companies and in defense procurements / supply charts. As Mr Toyoda and his engineers told the Cadilac VP after they toured the robot Cadliac line and she presented and told us the story at the Quality Conference in Canada. He queried her on solving problems and so few people to solve them, plus so many robotocs etc. He said that if you do not control your processes, with your people, 'I fear you will only make what you do, badly, quicker'. GM had to write-off so much of their then Captial Investment.