PHY.1:10 - Architectural Rationale

Physical similarity is constructed from the effects that produce the requested answer. Choosing those effects before solving scale equations makes it possible to explain why a setting matters and to revise the comparison when the question changes. Comparing geometry alone would omit the different scaling of physical contributions. Requiring complete behavioral similarity for every use would exclude cheaper comparisons that preserve one useful result.

The physical and mathematical work remain connected. Physical reasoning supplies the laws, their regime and the realizable changes; mathematical operations expose joint conditions and transfer the consequence. Computation can solve those conditions or examine a mismatch. Their common inference and result-use methods are provided by FPF, while this pattern develops the physical scaling construction.