Downloaded from https://www.everyspec.com APPENDIX C MIL-STD-31000A C.6.2. Data checking processes and procedures. The quality of 3D models should be checked whenever control of the models passes from their originating designer to other people or systems. It should also be noted that ideally the originator or the group who has the design authority over the models should perform these checks and then provide evidence of their completion. The reason for this is to expedite any changes that may be needed to satisfy the checking process. Events that trigger data quality checks may include the following:
Check-in by the designer to a product data management (PDM) system Translation from one CAD system to another CAD, CAM, CAE system or visualization system Translation from a the proprietary format of a CAD system to an ISO or ANSI standard format Translation from an ISO or ANSI standard format to the proprietary format of a CAD system Translation from a CAD system to a long-term archival format Retrieval from a long-term archive Use in finite element analysis Generation of tool paths for numerically controlled manufacturing machines To save both schedule time and engineering labor, data checking should be performed as part of an automated procedure approved by the contracting officer’s technical representative.
The procedure should define the following: Acceptable software products and releases to be used for checking 3D model quality Applicable product data quality criteria as defined in this guide Acceptable threshold values for product data quality (PDQ) criteria (Exhibit B contains recommended values.) Actions that trigger validation checks Procedures for recording quality defects found within models Recommendations and procedures for correcting models with quality errors 77