List mandatory and deferred work
Synthetic rehearsal budget is 60 minutes. One operator executes setup 8, critical DB restore 25 and critical journey verification 12 sequentially. Archive restore 20 may be deferred; it is not required for the critical journey. Durations are supplied estimates, not measured performance.
| Task | Minutes | Scope |
|---|---|---|
| Setup | 8 | Required |
| Critical DB | 25 | Required |
| Journey verification | 12 | Required |
| Archive | 20 | Deferrable |
Calculate the sequential critical path
- Include setup and verification
- Sum mandatory sequential work
- Compare full and critical scope
No task may be treated as parallel without a supplied worker/dependency plan.
What fits 60 minutes and how much headroom remains?
Show the worked answer
Critical scope totals 45, leaving 15 minutes. Full scope totals 65 and exceeds budget by 5. Critical completion must explicitly leave the archive pending.
Preserve deferred scope in the decision
| Case | Decision | Reason |
|---|---|---|
| Critical only | Fits 45 min | 15 min headroom |
| All four tasks | Does not fit 65 min | 5 min over |
Use the rehearsal to record actual durations and verified task output. A calculated fit is not an achieved restoration-time claim.