PHY.10:4.3 - Construct the experiment that can realize the contrast

Translate the mathematical change into physical preparation and operation. Identify the means of imposing the input, the initial or boundary conditions it requires, and the observable response. Include timing when a transient, memory or change of state is decisive.

Determine which shared conditions must survive. Maintaining geometry, material state or a reference can be more consequential than increasing the number of readings. When the intervention itself changes one of these conditions, either include that change in both predictions or construct another contrast.

Derive the subject-apparatus response far enough to establish that the difference reaches the recorded indication. PHY.9 constructs a missing coupling, reference or readout; C.16.MR represents the resulting measurement relation. A detector that clips both predictions to the same indication cannot implement their proposed separation.

Account for feasibility through the parts that can change this design. Available force, pulse duration, preparation time or observation range can rule out a proposed contrast or leave it conditional. An established apparatus or supplied capability can settle those questions without rebuilding its justification. If the required operation remains unavailable, return that specific limit or choose another contrast.

Use a reference or control for a named alternative explanation. A no-drive comparison can reveal an offset; a reference pulse can bound a control error. Add it when the result can change the interpretation.