SYSE.24:10 - Rationale

General decision theory can compare options only after they answer the same decision question and carry a shared comparison basis. Systems Engineering adds the missing domain move: it constructs complete ways of obtaining an engineering result across a designated project system-of-interest and its builder arrangements when those structures matter, together with provider and internal Work, interfaces, configuration, assurance, and continuing change.

The obtaining arrangement is the unit of comparison. Comparing whole arrangements keeps their different contributions visible: an AI Agent can perform Work in several arrangements; Method development can enable an arrangement or be the sought result of a separate project.

The pattern stops before procurement becomes a universal Systems Engineering Method. Specialist areas—for example, market engagement, contracting, incentives, tender, public authority, finance, organization, and provider operation—have their own problem families and evidence. Systems Engineering keeps their consequences connected to the engineered result without taking over their decisions.