Identify each blocking source
Synthetic S15 base day 09:00–17:00 has approved absence A13:00–15:00 and independent site drill B14:00–16:00. Withdrawal decision cancels A only. All windows include start/exclude end. The site drill remains a supplied nonworking block, not a leave balance rule.
| Source | Interval | After withdrawal |
|---|---|---|
| A absence | 13:00–15:00 | Removed |
| B site drill | 14:00–16:00 | Retained |
Withdraw the named source only
- Match withdrawal to sourceA
- Remove A contribution only
- Retain B interval
- Publish source-aware availability
Overlapping time does not make A and B the same administrative cause.
Which hour becomes newly available and what remains blocked?
Show the worked answer
13:00–14:00 becomes newly available. 14:00–16:00 remains blocked by B, so removing A does not restore its whole two-hour interval.
Recompute the remaining availability
| Case | Action or result | Evidence boundary |
|---|---|---|
| Restore all 13–15 | Reject | 14–15 still covered byB |
| Remove sourceA only | Accept | B retained independently |
The change record names A and keeps B evidence. Use the surviving windows for later staffing work rather than treating withdrawal as blanket availability.