To reduce the amount of work and cost involved in producing workshop
documentation, and to facilitate the reuse of existing engineering
and product development information, Porsche developed
an Integrated Workshop Information System: PIWIS. The core components
of PIWIS are the PTC product information delivery solution,
Arbortext, which provides product- and configuration-specific
information—either online or on paper–to complete the relevant
service or maintenance task, as needed.

Source: www.PTC.com