Solution Design & Architecture·Task 1.3·Bloom: apply·Difficulty 3/5·8 min read·Updated 2026-07-14

The Tightest-Constraint Decision Rule for the CCAR-P Exam

Select appropriate architectural patterns (workflow, agentic, augmented LLM)

SUBy Solomon UdohReviewed by Solomon UdohAI-assisted · human-reviewed
In short
The tightest-constraint decision rule identifies which of the five deciding factors, predictability, error cost, observability, latency, cost, is least tolerant of the wrong choice for a given problem, and lets that factor pick the pattern. Very high error cost, for example, can rule out an open-ended agent regardless of the other four factors. A pattern recommendation without a named binding constraint is not a defensible architecture decision.

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