Tolerancing is to define in-process workpiece (IPW) tolerances in
conjunction with the schematic process plan, process behaviour and
design specification of the part.
The process control strategy is based on both the schematic process
plan and the required tolerances, but also on the behaviour of all included
processes.
The defined process plan is then analysed regarding tolerances and the
expected outcome of the process. The results are tested against
acceptance criteria to decide whether the defined manufacturing process
can be approved or not. If the manufacturing process has all the
necessary qualities to succeed, the process plan can be established and all
needed documents, programs, working instructions, etc. created.