Downloaded from https://www.everyspec.com APPENDIX C MIL-STD-31000A Figure 3. Example of the structure of a simple assembly model Attributes are non-geometric data stored in part or assembly files. Each attribute consists of a named field populated with specific data about the part. For instance, attributes may include material type, applicable standards, manufacturer’s brand names and part numbers or the name of the designer who made the model. Attribute data may be necessary to manufacture the part (such as material type) or useful for administrative purposes, such as the name of the designer and the date the part was created.
Lifecycle Data consist of information that describes the state of the part within a controlled procedure for development, review, release for manufacture, retention for maintenance and upgrades, and retirement and disposal. For example, the revision level and release date are lifecycle data that describe the administrative state of the part and change as the product moves through its review and approval cycle. Lifecycle data don’t describe properties inherent in the part (such as the material type or manufacturer) that are necessary information to make or procure the part. 55