How does your company monitor ongoing SPC? This includes monitoring Cp/Cpk/Pp/Ppk, control limits, dispersion, etc. This goes beyond the CMM. I am including measurements from micrometers, height gages, optical comparators, contracers, profilometer, etc.
We are a job shop that run different setups in presses, so variation from setup to setup on a particular part number is important to control. Currently, the operators entering the data monitor the information. Unfortunately, we have a culture that says, "As long as the Cpk is above 1.33, run the press." However, runs above and below mean and above and below control limits, trends, and range variation doesn't matter to production. This isn't good when the customer wants press floor data for SPC on critical characteristics and we have operators pencil whipping data and having massive ranges in their measurement methods that are impossible to see on certain features.
Our company is doing a refresher course on SPC at the end of the month for our production floor techs and operators, but I wanted to know how other companies collecting SPC data monitor and control the stats to assure that the most accurate data is being entered in their stats program.
