ABSTRACT
Traditional definitions of process capability have expressed it as 6σ identifying where virtually all of the individual values produced by the process will fall. There is a tool, or procedure, that uses basic statistical analysis and control chart theory to make the prediction of the expected percentage defective a fairly straight forward task. This procedure is often calling the process capability study because it is used to analyze the ability of a process to produce material within certain limits. Generally, organizations are satisfied when the variation in product specifications is greater than that in process capability. As long as virtually no defective material is being produced and the process is in control, there is no need to worry. Process capability tells the analyst within what limits the process is capable of producing. This information makes possible identification of those processes, as represented by machines, material, and people that simply are not capable of meeting specifications.
