SYSE.12:0 - Use This When

Use this pattern when engineers cannot reliably model, compute, build, integrate, test, release, or observe an engineered System because shared enablers—such as tools, data, models, automated or physical facilities, provider Work, and support arrangements—are treated as incidental infrastructure or as a product with no named practitioner Work.

Begin with one practitioner Work family and the engineering result it must produce. Identify the actual Systems that enable or obstruct that Work, the capability practitioners need, the capability claimed for each platform or provider System, the conditions under which those Systems participate or provide a result, and the burden or failure that should change. Then choose whether to retain or change the enabling arrangement for that engineering result.

For a decision made before the relying Work, assess platform readiness and record a platform readiness assessment based only on evidence already available. After practitioner Work, the responsible Agent reassesses the platform and records a platform-use assessment based on observed participation, provision, burden, failure, and engineering results. Both assessments are epistemes. Each names the System, capability, Work, relation, result, and evidence it is about without replacing any of them. The later assessment can revise later reliance but cannot retroactively support the earlier assessment.

Use SYSE.25–SYSE.29 directly when the missing result is a task-grounded platform improvement, a supported use path, an interface or contribution change, a qualified control placement, or a migration and retirement result. The selected service-software Methods in SYSE.30–SYSE.41 supply professional results for build, feedback, artifacts, environments, data change, deployment, exposure, reliability, recovery, repetitive burden, and capacity. Use those results to support the relevant platform claims, keeping evidence of pre-use readiness separate from observations of later use.

Use Organization Change Engineering when positions, assignments, authority, or organization architecture are the changed subject; Operations Management for continuing queues, support cases, capacity, and provider Work. When the professional move is not supplied by the common language or the selected service-software Methods, use a qualified application-profile Method—for example, for a laboratory, compiler, manufacturing cell, clinical environment, electrical bench, or ship facility. The software selection is not complete software engineering.