In the presented approach quality control strategies are
defined as consisting of an inspection strategy and the
implementation of measures to improve process quality.
Therefore, the categorization and evaluation concept includes
these two dimensions. The quality measures are evaluated
against the current situation, which is analyzed based on the
methodology presented by Haefner et al. [24].
First, the structure of the production network relevant for
the regarded product group has to be recorded. This includes
all internal sites, external suppliers and customers involved in
the value-adding process as well as the transportation
processes in between. For each site all relevant production,
internal transportation and quality-related processes, such as
inspection, rework and scrap processes, are recorded together
with their respective performance indicators. These include
cycle times, setup times, availabilities, failure rates and
inventory for production processes as well as time, distance
and frequency for transportation processes. For quality-related
processes, indicators such as inspection times and costs,
rework costs as well as scrap rates are recorded. If the
supplier structure for the regarded product group is too
complex, e.g. due to many links between various parts or
system suppliers and own factories, it could be advisable to
select only those suppliers, which manufacture a particularly
critical part or system for the quality of the final component.