You might have had some SPC training in the past, but it probably skipped over the correct steps to implement charting on the shop floor. Check it out, here they are:
1. Develop the total variance equation (Yes! This is the very first step!)
2. Determine which variance factors are adjustable, which are noise, and which can be set as a constant.
3. Minimize the variation of each of the participating variables - get the process in a steady state and capable. This includes eliminating your "special causes".
4. Accurately determine the correct distribution of each of the remaining variances
5. Determine which of the remaining variance factors you are going to chart
6. Pick the correct chart to evaluate that variance factor (variable)
Did anyone share that with you in your SPC training? If not...you missed out on the important stuff...
Don't feel bad, it's common.
1. Develop the total variance equation (Yes! This is the very first step!)
2. Determine which variance factors are adjustable, which are noise, and which can be set as a constant.
3. Minimize the variation of each of the participating variables - get the process in a steady state and capable. This includes eliminating your "special causes".
4. Accurately determine the correct distribution of each of the remaining variances
5. Determine which of the remaining variance factors you are going to chart
6. Pick the correct chart to evaluate that variance factor (variable)
Did anyone share that with you in your SPC training? If not...you missed out on the important stuff...
Don't feel bad, it's common.
