PHY.9:4.1 - Specify the physical distinction and conditions

Name two physical possibilities that the work needs to distinguish, or a quantity range within which an estimate is needed. State where and when the property is sought. A pressure before connecting a probe and the pressure maintained during readout can be different targets.

Choose the needed consequence. Detecting a change, estimating a value and deciding which side of a limit applies place different demands on the same arrangement. C.16 provides the characteristic and scale; C.16.IR determines what a given indication can resolve.

Include the conditions the work permits you to change. A prepared reference, imposed force, interrogation time or detector orientation is a potential experimental choice only when it can actually be controlled.