HCD.18:4.3 - Select properties by the decisions their values change

Use the profile’s property families as a search aid. Keep a characteristic when its values can change the use decision, identify a distinct repair, call for different evidence, or protect a contribution that another repair might damage.

For each proposed characteristic, try two possible material conditions. If both would receive the same practical response and evidence requirement, refine the distinction or remove the redundant coordinate. Split a compound coordinate when its parts can fail independently with different repairs. Subject accuracy and currentness may share a passage but require different evidence; explanatory sufficiency and criterion validity can diverge when a correct explanation is followed by a key that rejects a valid answer.

Declare the characteristic’s bearer and grain. A false arrow in one diagram, a missing operation across an explanation–exercise chain, and a whole-route omission have different reach. A local defect does not inherit the whole book’s grain merely because the evaluator opened the whole book.

When the decision depends on how much selected structure a reader can extract, select C.2.8 U.ExtractableStructuralInformation. Identify the material episteme, its expressing publication form and the reader or observer; fix the selected relations and correctness basis, usable preparation, operations, help, access and budget only as precisely as this comparison needs. These conditions qualify the three bearers. A material reference may identify the account and expression without new paperwork. Explanatory sufficiency and overall material adequacy remain different questions.

Make the selected set complete for the declared decision. A short diagnostic can legitimately borrow two profile questions, but then its conclusion is a bounded diagnosis, not a complete material evaluation. Do not call an omitted required property “not applicable” merely because it is inconvenient to observe.