The plant where I was working has been closed and the work moved to another country. As a result, I do not have access to any of my project folders.
As an example of improving a process using DOE, I had a cleaning process that used a chemical that we were going to have to stop using. I used test coupons to evaluate a large number of…[Read more]
In the classes that I have taken and all of the places that I have worked, a project is completed after implimentation and the savings have been verified.
This is a big problem for getting a certificate. You could do a great job on the analysis and management not fund the implimentation and you don’t get the certificate. But, the…[Read more]
You can do SPC charts with a sample size as small as one. The constants take care of the different sample sizes.
If you are making adjustments to the machines, the text book answer is that you can’t do the statistics until the system is in control. If you are making parts with the same parameter but with different values, you can do s…[Read more]
Thanks for your post. Yours is a very good example. I expect that everyone that has been doing this for very long has an exmple but I thought it was worth mentioning to some one that seemed to be just getting started.
I have had success using DOE to improve a process. You are correct that it can be a problem if the product is expensive and you don’t want to make scrap or if there would be a hazard to upseting the process.
In some cases, I’ve been able to make models that I could use in the lab to run the DOE. In other cases, I’ve had to work with…[Read more]
I would like to make two comments. The first being that one time I gave the same data to two different quality groups and one said that the gage was capible and the other said that it wasn’t. Different people have used different assumptions when developing the GR&R system and this can cause the results to be different. This could be a…[Read more]