SYSE.13:1 - Problem Frame

Continuing engineering keeps several configurations relevant at once—for example, candidate architectures, manufactured variants, installed software realizations, experimental units, or service replacements. Engineering, manufacturing, operating, and maintenance descriptions can also differ. Each kind of receiving Work may need different item boundaries.

Shared identifiers and records—whether kept in a product-data system, a bill of material, linked-model infrastructure, or a naming standard—do not remove the semantic problem. These resources can preserve identifiers and links, while engineers still decide what each identifier denotes, which differences matter to the decision, and what evidence connects the record to the actual System. One label can hide incompatible granularity; different labels can denote the same unit under different schemes.