Process capability studies calculate the process capability indices Cp and Cpk. These statistics tell us how well the process is meeting specifications or requirements. Capability studies are designed for two-sided specifications that have an upper and a lower limit. Adjustments must be made when we have a one-sided specification and/or a boundary limit in place […]
In our Green Belt course I introduce the concepts of process capability and process control. I find that many students have trouble understanding the difference between the two. This is compounded by the fact that the output of a process may fall into of four possible combinations of capability and control. Process capability looks at […]