Quality examples

Quality examples - example mean: Parameter Value Results...

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Sheet1 Page 1 POM -> Quality -> x bar POM -Quality -> Process Capability Sample Mean Range 3 sigma (99.73%) X-bar Chart Range Chart Parameter Value Results Value Sample 1 156.9 4.2 UCL (Upper control 156.5398 7.961 Upper tolerance limit 310 Process c 0.8889 Sample 2 153.2 4.6 CL (Center line) 155.16 4.48 Lower tolerance limit 290 Upper one 0.8889 Sample 3 153.6 4.1 LCL (Lower Contro 153.7802 0.999 Mean (optional) 302 Lower one 1.3333 Sample 4 155.5 5 Standard deviation 3 Sample 5 156.6 4.5 Averages 155.16 4.48 0.8889 is less than one so it is not capable If all of the ranges are between .999 and 7.961 it is in control another question - what should you do to make it capable? reduce the variation or you could shift the average Window -> Control Chart to get the graph shifting the average is easier Anything in RED is out of control the more powerful solution is the reduce the variation we could have taken the capability without knowing where the center line was
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Unformatted text preview: example mean: Parameter Value Results Value Upper tolerance limit 310 Process c 1.1111 Lower tolerance limit 290 Upper one 1.1111 Mean (optional) 300 Lower one 1.1111 Standard deviation 3 example change STDDEV: Parameter Value Results Value Upper tolerance limit 310 Process c 0.6667 Lower tolerance limit 290 Upper one 0.6667 Mean (optional) 302 Lower one 1 Standard deviation 4 would not work POM -> Quality -> P chart Sample Number oFraction Defective 3 sigma (99.73%) Sample 1 34 0.9714 Total Defects 194 Sample 2 32 0.9143 Total units sampled 210 Sample 3 31 0.8857 Defect rate (pbar) 0.9238 Sample 4 35 1 Std dev of proportio 0.0448 Sample 5 32 0.9143 Sample 6 30 0.8571 UCL (Upper control 1 CL (Center line) 0.9238 LCL (Lower Contro 0.7893...
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