Check the interruption boundary
Synthetic rule: finish an active task first if at most thirty minutes remain, unless an authorised emergency override exists. Task A has twenty minutes left. New high-priority B needs one hour, but no emergency override is supplied. One operator handles both tasks. C is queued behind B.
| Task | Current position | Decision |
|---|---|---|
| A | Active; 20 minutes left | Finish first under rule |
| B | New high priority; 60 minutes | Next after A |
| C | Queued; lower priority | Stay queued |
Change the queue while protecting the permitted finish
- Read A remaining work
- Check emergency override
- Finish A in twenty minutes
- Start B next
If A actually has forty minutes left, the finish-first condition fails; the lead must apply the other supplied interruption rule rather than reuse this decision.
B starts twenty minutes later and finishes eighty minutes from the decision point. Preserve the priority change without marking B in progress while A still consumes the only operator.
Does high priority alone permit B to interrupt A under these inputs?
Show the worked answer
No. A’s twenty-minute remainder meets the finish-first rule and no emergency override exists. B starts after A.