Part B - Compare, observe and act

§	ID & Title	Status	Keywords & Search Queries	Dependencies
1	PHY.1 - Construct Physical Similarity Across Changed Conditions	Usable, evolving	scaling; similarity; dimensionless groups; prototype; changed regime. When does a physical result transfer to a different size, material or condition?	PHY.5 for consequential omitted effects; mathematical methods for the resulting comparison.
2	PHY.2 - Construct a Physical Analogue from Interactions	Usable, evolving	physical analogue; mechanism; interaction; preparation; readout. How can another physical arrangement supply a wanted consequence?	PHY.5/.6 for physical description and evolution; PHY.9/.10 for observation and comparison; C.29.3 for computing realization.
3	PHY.9 - Construct a Measuring Interaction for a Physical Distinction	Usable, evolving	measuring interaction; transduction; reference; calibration; disturbance; ambiguity. How can the needed property be made to affect an observable indication?	C.16.MR for the measurement relation; C.16.IR for inference from indications; PHY.10 for competing physical accounts.
4	PHY.10 - Construct a Physical Test That Separates Rival Accounts	Usable, evolving	rival accounts; physical contrast; preparation; apparatus; parameter freedom; noise. Which feasible comparison separates the consequences that matter?	PHY.9 for a needed readout; PHY.6 for evolution; B.5.TC for theoretical comparison.
5	PHY.3 - Derive a Physical Limit from Permitted Transformations	Usable, evolving	physical limit; impossibility; reversible reference; complete exchanges; changed premise. What can a proposed transformation achieve under the physical laws and resources supplied?	C.29.BB for balances; MATH.11/.20 for invariants or bounds; PHY.2 for another physical construction.