is a method used to demonstrate that a process
is 'capable' of achieving the required tolerances
(specifications). It is a routine requirement
for all processes in the automotive industry,
among others. Process Capability is measured
using the indices Cp and Cpk.
Process Performance is a closely
related concept, but the calculation of
the performance indices Pp and Ppk is done
in a way that takes into account longer
term variation in the process. Process Performance
is usually used for process improvement.
Topics in Process Capability
and Process Performance include: