PHY.9:1 - Problem frame

Use this pattern when a physical difference matters to the work, but the available arrangement does not make that difference observable. You may need to choose a sensing effect, prepare a reference, separate a wanted response from another influence, or change a probe that disturbs its subject.

The first result is a proposed measuring interaction with a usable response: what to prepare, what to couple, what to observe, and which physical differences the response can resolve. It can remain conditional on an identified coupling, calibration or operating range.

C.16.MR constructs the relation between a sought property and an indication. This method develops its physical realization when that realization is missing or inadequate. The work concerns designing an interaction, before or after a measurement exists. It need not produce a new instrument; changing a preparation or comparison can suffice.

You need to interpret the relevant physical theory and the conditions under which its effect occurs. Mathematical or experimental collaborators can supply calculations and implementation while you retain the wanted distinction. The examples supply their additional mechanical, fluid and quantum premises.

Use an existing arrangement and calibration when they already resolve the question. If the physical arrangement is suitable and only inference from its records remains, use C.16.IR or MMP.7. A more elaborate sensor is unnecessary when the present response already supports the decision.