Choose properties from the promised work
Recover the task denominator from the promised work and qualified subject requirements, including prerequisites, consequential variations, and critical errors. Then compare it with the actual explanations, examples, practice, and usable returns. The present headings can help locate content but cannot remove a necessary task from that denominator.
The following families are selectable domain content, not a fixed vector. Keep a characteristic only when its values can change use, repair, evidence collection, or protection of another useful contribution. HCD.18 makes the selected set complete for the particular decision.
| Characteristic family | What distinguishes useful support from a limiting defect | Typical repair and evidence |
|---|---|---|
| Task and dependency coverage | Every promised task and consequential variation has its needed operations and prerequisites available. | Trace required work to actual contributions. Supply an absent operation, usable qualified return, or narrower promise. |
| Subject validity and distinction integrity | Claims, examples, diagrams, and criteria preserve domain-correct kinds, relations, units, conditions, and justified claim strength. | Test a plausible countercase against a qualified subject basis. Correct the relation and its actual dependents. |
| Extractable structural information, when the amount matters | What selected structure this reader can correctly extract from the material episteme through this expression under the stated conditions, using C.2.8. | Name recovered and missing relations; use fixed semantic units if counting. Repair the missing or false relation, expression or usable return. Keep amount, effort, material adequacy and learning distinct. |
| Explanatory sufficiency | The reader can recover why the next move follows and when it changes, with the declared assistance. | Follow the explanation through a worked case to use. Restore a missing ground, contrast, transition, or operation; obtain relevant reader evidence when the claim needs it. |
| Example discrimination | The example makes a consequential difference between the intended rule and a plausible wrong rule. | Try both rules on the examples. Add or change a contrast where their predictions differ. |
| Task and criterion validity | The task elicits the promised contribution, and the criterion accepts valid alternatives while rejecting a plausible error. | Independently solve and challenge the task and key. Repair the criterion before blaming the reader or changing a correct explanation. |
| Feedback and continuation support | The arrangement lets a reader identify a discrepancy, correct it, and undertake a relevant next attempt. | Inspect and observe the feedback’s function. Supply criterion-bearing help and a retry, or repair an unavailable promised service at its owner. |
| Concrete and expressive support | An action, observation, example, image, or memorable cue reveals the relation needed in use, with its limits recoverable. | Retain or restore decision-bearing detail and vivid examples. A quiet reference needs no decoration merely to appear engaging. |
| Representation semantic fit | The chosen text, image, table, or interaction exposes the needed relation accurately and accessibly. | Repair the mapping, label, relation, pacing, or relevant alternative representation. Inspect an export separately when its rendering changes access. |
| Language comprehensibility for the audience | The reader can interpret the claim and scope without an accidental negation, ambiguous referent, or unintroduced language burden. | Repair the meaning-bearing span in the declared language. A local authorial-voice requirement remains local. |
| Currentness of relied-on content | The particular claim and dependent operation fit the declared subject or source state. | Recheck the changed premise and its consumers. Age alone does not decide whether a claim remains usable. |
| Practical addressability and access | The reader can reach the source, prerequisite, task, or feedback needed at this point. | Repair the actual target or accessible return. A broken link is not evidence that the underlying subject claim is false. |
| Narrative attachment, when live | The current question, new contribution, reason for placement, and later payoff connect across the actual sequence. | Use NSTD.8 to inspect both endpoints and restore the needed relation or placement; no connective-word quota is implied. |
| Progressive reconstruction support, when live | The required operation fits the structure already introduced or legitimately available, with adequate support for the new relation. | Use NSTD.8 to supply a contrast, map, worked relation, recap, usable return, or better order while retaining useful difficulty. |
These properties can share observations without sharing a value. A correct explanation can coexist with an invalid key. A teacher can rescue an explanation while the example still fails to distinguish a rival rule. A diagram’s semantic fit can be adequate while a particular export makes its labels unreadable. Split questions when their evidence or repair differs; do not count one shared observation several times as independent evidence.