01
What makes this the same piece of equipment?
This proposed workshop begins with the fictional serial-number rule I approved and asks participants to identify the population within which an identifier is meaningful. The 640-record exercise provides 588 clear relationships and 52 requiring investigation;44 are resolved and eight remain held. Participants compare a convenient automatic prefix with documentary and physical verification, including the schedule and cost consequences. The intended output is a defensible account of what a match means and who can resolve an exception. The session does not certify equipment or establish that every ambiguous record caused a bad repair. It is an unpublished proposal using invented records, with no real customer history or device credentials required. Participants should leave with a clearer question for their own information model, including where a precise field value is being used to imply a broader conclusion. Engineering authority remains with the qualified owners rather than being transferred to the person designing the database or facilitating the discussion.