Downloaded from https://www.everyspec.com APPENDIX C MIL-STD-31000A C.9.4 Assembly structure validation criteria C.9.4.1 Unmatched Assembly (G-AS-UM) Definition: A sub-assembly in one assembly has no corresponding sub-assembly in the other assembly. Measurement: The criterion is false if any sub-assembly in the native model does not have a matching sub-assembly in the translated model. Effects of condition on model-based definition translation: If the unmatched sub-assembly is in the native assembly, it represents significant data loss.
If the unmatched sub-assembly is in the translated assembly, it causes confusion and is generally the result of incorrect filtering during the translation process. C.9.4.2 Unmatched Part (G-PT-UM) Definition: A part in one assembly has no corresponding part in the other assembly. Measurement: The criterion is false if any part in the native model does not have a matching part in the translated model. Effects of condition on model-based definition translation: If the unmatched part is in the native assembly, it represents significant data loss.
If the unmatched part is in the translated assembly, it causes confusion and is generally the result of incorrect filtering during the translation process. C.9.4.3 Split Assemblies (G-AS-SP) Definition: A sub-assembly in the native model corresponds to two or more sub-assemblies in the translated model. Measurement: The criterion is false if any occurrences of this condition exist in the model pair. Effects of condition on model-based definition translation: This structural change can cause confusion when the specific structure of the native model is intended to be reused by downstream processes.
If this change is acceptable, it must be clearly identified and managed by a validation process or else other validation criteria will be evaluated incorrectly. C.9.4.4 Split Parts (G-PT-SP) Definition: A part in the native model corresponds to two or more parts in the translated model. Measurement: The criterion is false if any occurrences of this condition exist in the model pair. 143