A method for creating a generated data set(s) for use in process capability calculations that mimics the statistics of a raw data set is presented. The method includes the steps of inputting desirable statistics and generating numbers from theoretical statistical distributions. This generated data can be combined with other generated data and used to calculate global process capabilities. In addition, the global process capabilities can be used to accept or reject supplier(s) from a list of suppliers. An apparatus for implementing the method outlined above comprising raw data statistics, number generating algorithm(s) and storage medium(s) is also presented.