failure

Expected contribution

Record a candidate missing contribution precisely enough to test whether it was required or anticipated, including any conditions that made the expectation applicable.

1. What specific act or contribution was expected, and what would have counted as performing it? definition
2. Which commitment, rule, prior practice or prediction supports that expectation on this occasion? provenance
3. Had the expectation expired, been withdrawn or been superseded before the act became due? boundary

Attributed surprise

Record unexpectedness against an identified perspective and the information available before the omission was discovered; retain disagreements between perspectives.

1. To whom was the omission unexpected, and what did that party expect before discovering it? definition
2. What contemporaneous evidence supports the expectation rather than a retrospective claim that the act should have happened? provenance
3. If the actor anticipated or intended the omission but another party did not, does the instance satisfy this registry sense? boundary

Closed or missed opportunity

Record when the act became applicable and the point at which its continued absence could count as an omission.

1. Which event or condition triggered the expected act, and is there evidence that it occurred? provenance
2. What deadline, tolerance interval or closing opportunity determines when the act counts as omitted? measurement
3. Is the act already missing from a completed opportunity, or could it still occur within the original expectation? boundary

Supported absence

Record what was checked, what those checks could detect and whether they support total omission, a missing component or unresolved occurrence.

1. What observation, record or testimony supports nonperformance, and could that evidence miss an act that actually occurred? provenance
2. Was the whole act omitted, or which required component was missing from an act otherwise performed? definition
3. What additional check would distinguish omission from delayed reporting, poor visibility or an incorrect act? action

Performance gap

Record who or what was expected to act and which prerequisites were available, missing or uncertain; keep causal explanations provisional where evidence is incomplete.

1. Who or what was expected to perform the act, and what establishes that assignment? provenance
2. Which necessary information, resources, permissions or upstream contributions were unavailable when performance was due? provenance
3. What evidence distinguishes inability, overlooked work, intentional nonperformance and a mistaken expectation? boundary

Affected dependencies

Record observed and anticipated effects separately, including whether a substitute or safeguard prevented the omission from causing an adverse outcome.

1. Which subsequent acts or outcomes depended on the omitted contribution? definition
2. What observable delay, loss or other change is attributable to the omission, and how is it measured? measurement
3. Did another contribution or safeguard preserve the outcome despite the omission? boundary

Recoverable contribution

Record the remaining value of performing the omitted act, available substitutes and any constraints on intervention.

1. Can the omitted act still fulfil its intended role, and when does that recovery opportunity close? measurement
2. Should an authorised actor complete the act, provide a substitute, escalate the omission or accept the missed opportunity? action
3. What check is needed before retrying to avoid duplicating an act whose occurrence is still uncertain? action

Verified resolution

Record evidence for closure and whether it establishes late completion, compensated consequences, an irrecoverable omission or a mistaken original assessment.

1. What evidence demonstrates recovery, compensation or the end of any useful recovery opportunity? provenance
2. Does new evidence show that the act was omitted and later supplied, or that no qualifying omission occurred? boundary
3. Which expectation, assignment or detection practice should change to reduce recurrence or false classification? action

Check these first

Recalled without web access and unsourced; every item is a lead to verify.

1. Which of these check these first hold for the sense of failure this model covers, and on what evidence? provenance

Kinds and varieties

Recalled without web access and unsourced; every item is a lead to verify.

1. Which of these kinds and varieties hold for the sense of failure this model covers, and on what evidence? provenance

Real-world use

Recalled without web access and unsourced; every item is a lead to verify.

1. Which of these real-world use hold for the sense of failure this model covers, and on what evidence? provenance

Typical measurements

Recalled without web access and unsourced; every item is a lead to verify.

1. Which of these typical measurements hold for the sense of failure this model covers, and on what evidence? provenance

Failure modes and hazards

Recalled without web access and unsourced; every item is a lead to verify.

1. Which of these failure modes and hazards hold for the sense of failure this model covers, and on what evidence? provenance

Neighbouring kinds and how to tell them apart

Recalled without web access and unsourced; every item is a lead to verify.

1. Which of these neighbouring kinds and how to tell them apart hold for the sense of failure this model covers, and on what evidence? provenance