OPS.10.1:10 - Architectural Rationale

To compare capacity choices, explain how available resources perform activities under a policy and produce the required results. Measurement supplies the quantities, mathematics supplies relations and computing obtains consequences. Their correspondence to the operating work determines what a calculation answers.

The construction therefore separates what the resources must do, how their service evolves and which result is requested. The same arrangement can need a finite deadline model today and a continuing mean model for another decision. Cases 5.1–5.3 show changes of variation, dependence and interpretation that a single scalar capacity value cannot retain.

Common model construction, inference and comparison remain in their supplying Methods. This pattern supplies the service laws and operating assumptions needed to use those Methods for a capacity decision.