Conciseness

The RTO/RPO definition table ("Maximum acceptable length of time the application can be offline") and the cold/warm/hot standby definitions re-explain concepts Claude already knows, and the Run protocol stages (1, 2, 4, 5) substantially restate Steps 3-5. Not 4: this is more than minor over-explanation — two sections of known material plus structural duplication that could be tightened.

Actionability

Copy-paste-ready markdown templates for the pre-drill checklist, drill workflow, and a fully worked post-drill report (realistic T-timeline, categorized findings, owners and due dates), plus concrete refusal conditions ("DR environment identifier matches prod") and specific measurement guidance ("sample on a fixed interval (60 s...)", "backup SHA-256 integrity"). Not 4: the templates cover the cold, warm, and hot cases with no significant execution gaps.

Workflow Clarity

Steps 1-8 and Run protocol Stages 1-5 are explicitly sequenced with T-timestamps, validation checkpoints (replication lag within RPO at T-30, verify primary health before recording fail-back complete), and explicit feedback loops (abort on TTF > RTO and record breach metrics; an improvised runbook step is logged as a MAJOR finding). Not 4: validation and error-recovery paths are pervasive, not merely mostly present — critical for a failover workflow.

Progressive Disclosure

The body is an overview that signals its two one-level-deep references inline at the point of need ("restore-time tests - references/restore-time.md", Stage 1 backup-verification) and again in a References section; both files exist and carry the deep detail (verification harness, restore-time measurement). Not 4: the split is appropriate and navigation is easy, with no inlined content that clearly belongs in a separate file.

Specificity

Lists six concrete deliverables — "Writes a runbook with RTO and RPO per tier, a pre-drill checklist, timed failover and failback, abort rules, an audit-ready report, and backup and restore checks" — with comprehensive coverage of the DR-drill domain. Not 4: no meaningful capability gaps within that domain.

Completeness

Explicitly answers both: "Use when a disaster-recovery drill for one service is being planned, run or written up, or a new tier-1 service has no drill" (when, with three concrete triggers) and the deliverables list (what). Not 4: the 'when' clause is fully explicit rather than merely present.

Trigger Term Quality

"disaster-recovery drill", "planned, run or written up", "tier-1 service", "failover" are phrases a user would naturally say. Not 5: common synonyms such as "DR test", "business continuity", or "game day" are absent.

Distinctiveness Conflict Risk

"disaster-recovery drill for one service" plus "a new tier-1 service has no drill" carves a clear niche with distinct triggers, unlikely to fire for generic runbook, backup, or chaos-engineering skills. Not 4: overlap risk is minimal, not minor-but-present.