3. Separate the designated System, builder arrangement, platform, Method, Work, and culture

Use SYSE.3, SYSE.11, and SYSE.12 to identify the realization arrangement, usable increments, and engineering platform contribution. Use SYSE.20 to distinguish simultaneous Work from dependencies that require order. Use SYSE.15 for the Method repertoire, SYSE.19 when a relied-on source changes, and SYSE.21 only for a question about continuation across a practitioner population.

Use SYSE.23 to compare changes to a surviving System-family option, its builder arrangement, or both. A part or family-membership structure of an actual or intended System, a service or dependency relation with a builder System, and Work order are different relations. Practitioner capability and cultural continuation remain results of their own patterns. A build-before-trial dependency is a bounded unfolding; it does not make problem development, System-family development, and builder development three universal stages or levels.