Multiplicity of processes available for a job the selection of an appropriate process is not an easy matter. Choosing a process with over capability is as bad as choosing one with under capability because an over capable process will generally be more expensive and will needlessly increase the production cost. On the other hand a process with less than required capability will not meet the quality requirement and may lead to excessive rejection and rework which again will attract additional cost. Therefore from teh economic considerations we must select process whose capability matches the quality requirements of the job.