His students wrote some, too and they are worth reading. Save yourself many thousands of dollars and a lot of frustration (consulants have to make you feel "stupid" for the first few sessions to justify their full fee) by going to the library and reading some of Deming's books. Every single statistically based quality program owes its roots to Deming. Personal note: All of the quality buzzwords are nothing more than a way to make consulatnts money. Assuming the operator has adjustment control over the process, he/she can use this "real time" control chart to make adjustment decisions. You can use the control limits from your capability study and plot points as you go. For example, sample five consecutive pieces with a frequency of 1 hour. 2 - Assuming your process is varying randomly (read: predictable) and capable of meeting the spec, run a control chart over time.
First, is the process variation random? Assuming it is, is the process capable of meeting the print tolerance (what is the Cp, CpK, CpU - whatever capability index you choose to use)?
The Capability Study will tell you two important things. Reading will be taken on consecutive pieces (100% inspection). I prefer using a standard Xbar & R chart as a format with five-sample subgroups for 20 subgroups. 1 - run a Capability Study on the process. I'm trying to make a simple target in PPMs.
>production floor that has no experience with capability studies, and process
0 kommentar(er)
