Design for Six-Sigma | Six-Sigma Product Design | Tolerance Analysis | Product Development

In complex assemblies in which there are many interacting components and dimensions, we need to prevent tolerance stack-up problems. In this video, we learn how to set specifications on each component with six-sigma concept to ensure that the final product after assembly meets specifications and has a reasonable process capability value for the assembled device.

[@josechvaicer7328]

Note 1: @ 11:09 ==> sigma 3 and 5 !!!!, not sigma 4. Note 2: @ 11:21 ==> 0.000277/4 = 0.0006925 and not 0.0006944 !!!! Great video. I learned a lot, but it must be corrected.

[@mikesjlsaharabuild9787]

How did you assume the relationship between sigmas for the individual components at the 11:00 mark? Your first video on Process Capability Analysis was great, taken at a nice pace that was easy to follow., and performing each step and explaining in detail was very beneficial to the video. I just watched your videos on measurement system analysis and they weren't as detailed. Still good videos but not as easy to follow and it seems like the explanation and reasoning was skipped for a few steps. I recommend sticking to the style of your first video to maximize the benefit to your viewers. Thank you for your work here, it is greatly appreciated

[@pablogarcia-to7vv]

Hello Mike, did you find the answer to your question? if you did, could you please share your answer. I'm also having questions about the tolerance values presented at the minute 1:37 (x1=0.0004; x2=0.0001; x3=0.009; etc), do you have any clue about how he got this numbers? I'm assuming he got the numbers from a previous analysis done in minitab, and this is the value of the standar deviation from each tolerance component.

[@garrydu3936]

@@pablogarcia-to7vv Here is how I interpret it. The tolerance on the left are design tolerance which is required by the designer. They indicate the part upper and lower limits to be an NG part. The stdev on the right was calculated from CPK he said. For example one spec's design tolerance is +/- 0.1. The CPK given by supplier is 1.5 so the dimension stdev is (0.1+0.1)/6/1.5=0.02

[@TheDazzler420]

How did you calculate the variance that is Sigma^2? = ((0.05-0)^2+(-0.05-0)^2)/(population [2])?? or is this derived from the inspection report from actual measurement?

[@mikesjlsaharabuild9787]

How did you find the relation between sigmas @ the 11:00 mark?

[@raghavendrapalekar6739]

Can you pls tell the variance formula