PHY.4:4.1 - Recover the participants and the relation being sought
Name what interacts, what is prepared, what can be exchanged and what response matters. Include surrounding bodies, material state, fields or boundaries when they can change that response. An omitted orientation or stored state may matter more than an additional numerical parameter.
Choose candidate quantities from that physical account. Explain how each quantity describes a participant, preparation or interaction. A.3.3.TR supports constructing a state that distinguishes different possible continuations; here the physical account supplies what retains and changes that state.
Decide what kind of relation is being proposed. An instantaneous mean response y=F(x) assumes that the chosen current inputs determine that mean. Memory, unresolved states or several possible responses can require a history, additional state, a probability law or a relation admitting several outputs. MMP.10 and MMP.11 express those mathematical choices after the physical conditions are identified.
Retain the status of the premises. A studied physical law, an idealization and a proposed hypothesis can all support reasoning, with different conditions on its use. Use the resulting conditional consequence when it already answers the present question.