Should you use Spc charts for dependent data? I was told it is not suitable and a run chart should be used instead. Example below Numbers of...
Hi everybody, We want to use six sigma project, and our data is binary. We are assessing a production line which produce about 20000 products (it...
Hey everyone, I'm trying to do SPC in consumer electronic industry and we make AC-AC converters, AC-DC converters. I was wondering what factors...
We have a laboratory process that processes batches of 96 samples at a time. The average of each batch is recorded in an Xbar-s chart. The...
I have a question regarding products with multiple testing variables. For example, a single product will be tested for pH, %solids and zeta...
Hi, I'm starting with SPC in my company. To my understanding to run SPC you need first to set up what I call the benchmarks (UCL and LCL) using...
Alchemy was a pseudo-science that was attractive to many because if it worked, it would be easy to become wealthy. Imagine being able to turn a...
I am posting a few new resources. I whimsically refer to them as my ‘memoirs’ or ‘what I have learned from 35 years in the quality profession'....
I recommend reading this recent article at Quality Digest: Shewhart and the Probability Approach note that Quality Digest has closed the comment...
I'm painfully aware that Xbar and R charting doesn't work in a machining environment that generates "sawtooth" datasets. I've seen charting that...
There is the audit checklist from customer asking whether the 100% inspection is done on the product when the SPC out of control is found (e.g....
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