Week 3: LR-20 DOE and Gage R&R

This week was again another step away from hydration because there are other problems to overcome before we can continue the hydration process.

Similar to the LR-14 DOE, we ran another DOE except for the LR-20s. We wanted to again find if there is was any problems with the variance between shot to shot and cavity to cavity. After measuring the weights of 5 shots of LR-20 we found that the variance was a lot smaller cavity to cavity than what we found in the LR-14s despite some outliers. We concluded that there may have been a venting problem with the molding press.

We also ran a Gage R&R, standing for Gage repeatability and reproducibility, on a new program that was made to more accurately measure the plastic parts being made. The customer wants the parts to only have a certain amount of variance. A sample of the parts must be measured and analyzed to determine if the parts fit the criteria. However there are multiple ways of measuring these parts. We have a newer program that is a lot faster and more accurate. However we must run a Gage R&R to show that this new method is just as accurate if not more. A Gage R&R is a statistical tool helps investigate the amount of variability the measurement system is causing, or in more simple terms it determines how reliant the measurement method is. Unfortunately we were unable to analyze the data from the Gage R&R due to time constraints. I’m looking forward to next week where we will be able to determine if our new program is adequate.