Define which boundary is included
Synthetic 18:00 session accepts check-in from 17:45 inclusive until 18:15 exclusive. Too-early arrival leaves the booking confirmed but not attended. A late arrival requires staff review and does not automatically become absent before attendance close. Times are recorded receipt times in Hong Kong local time.
| Arrival | Time | Window test | Result |
|---|---|---|---|
| A-W1 | 17:44:59 | Before open | Too early; not checked in |
| A-W2 | 17:45:00 | Opening included | Check-in accepted |
| A-W3 | 18:14:59 | Before close | Check-in accepted |
| A-W4 | 18:15:00 | Closing excluded | Late-arrival review |
Preserve the arrival result
- Read the exact booked occurrence, arrival time and window rule.
- Compare arrival with both window boundaries.
- Accept eligible check-in or record early/late handling without settling absence prematurely.
An untrusted or missing time cannot be forced into the window; record a staff-confirmed arrival decision with evidence instead.
How many of the four arrivals are accepted automatically?
Show the worked answer
Two: A-W2 and A-W3. A-W1 is early and A-W4 sits at the excluded closing boundary.
Keep arrival time and check-in acceptance time distinct when staff resolve a late arrival later.