# Beacon / two days to delivery.

Fictional practice records — no customer incident.

An editorial delivery delay measured across calendar days. Inspect the source dates, distinguish a reviewer report from observed records and carry the handoff into owned follow-up actions.

## Reviewed milestone intervals

- Impact to detection: 90m
- Detection to mitigation: 1350m
- Impact to resolution: 2d

Intervals are computed from the explicitly selected event IDs. Reported timestamps remain reported; chronological proximity does not establish causation.

## Timeline (UTC)

| Time | Phase / status | Event | Evidence |
| --- | --- | --- | --- |
| 2026-10-08T10:00:00Z | impact / observed | beacon-01: Scheduled edition has no completed release record | beacon-source (CSV row 2) |
| 2026-10-08T11:30:00Z | detected / observed | beacon-02: Delivery check detects the missed edition | beacon-source (CSV row 3) |
| 2026-10-08T12:00:00Z | note / reported | beacon-03: Reviewer availability reported in a handoff note | beacon-source (CSV row 4) |
| 2026-10-08T13:00:00Z | note / hypothesis | beacon-04: Missing backup review proposed as the explanation | beacon-source (CSV row 5) |
| 2026-10-09T09:00:00Z | note / observed | beacon-05: Backup reviewer receives the authored draft | beacon-source (CSV row 6) |
| 2026-10-09T10:00:00Z | mitigated / observed | beacon-06: Alternative approval route opened as mitigation | beacon-source (CSV row 7) |
| 2026-10-09T14:00:00Z | note / observed | beacon-07: Reviewed corrections are preserved in the release note | beacon-source (CSV row 8) |
| 2026-10-10T09:00:00Z | note / observed | beacon-08: Release record updated for final verification | beacon-source (CSV row 9) |
| 2026-10-10T10:00:00Z | resolved / observed | beacon-09: Edition delivery confirmed in the exercise record | beacon-source (CSV row 10) |

## Cause statement — hypothesis

The approval handoff may have left the release without a clear backup reviewer. The proposed explanation needs confirmation from the editorial team.

## Owned follow-ups

- **Test the backup approval route** — Lena / editorial; due 2026-10-16; open; event beacon-04
  Acceptance: Record a controlled check with before/after evidence. Review the working hypothesis before changing production.
- **Update the detection and handoff checklist** — Kai / publishing; due 2026-10-19; in-progress; event beacon-02
  Acceptance: Run one fictional drill; preserve reviewed milestone IDs, source offsets and an explicit backup owner.

## Source files

- beacon-source: [Beacon editorial / exercise record](evidence/source-01.txt); SHA-256 `00582b108d34c5a39609f4f9813ecf1bf084db09de8475a99fcf7cd4be76f99f`
  Authored fictional exercise log. Event IDs and timestamp strings are preserved; source hash checks file integrity only.