The SASIG Long Term Archiving Retrieval (LTAR) Project developed a set of recommendations to guide companies to implement effective and efficient archival and retrieval practices. The recommendations are partitioned into four topic areas: 1) Format@ 2) Process@ 3) Time Period@ and 4) Quality Assurance. This document addresses the set of process recommendations. In particular@ this document aims to provide a company with the key activities@ inputs@ outputs@ controls and mechanisms needed to fully support the long term archiving and retrieval of product definition information. If your company is developing products using 3D models@ and asking for models and digital product data from your suppliers@ then this LTAR Process Recommendation is a must read.