時間とリマインダー

Reminder attached to a task (non‑interrupting timer)

Use when

• You want periodic reminders while a task stays open.
• The task should remain available until completion or timeout.

Pattern in simple words

1. Start.
2. User task: Await submission. Attach a non‑interrupting boundary timer set to a schedule, for example every three days.
3. On timer: Service task Send reminder. End Reminder sent.
4. Main path: Exclusive gateway Submitted? If Yes, End Graded. If No and deadline reached, End Deadline missed.

Note: The timer does not stop the user task.

Other scenarios

• Finance: Invoice approval reminders.
• Healthcare: Appointment reminders before due date.
• Manufacturing: Supplier update reminders.
• Retail: Purchase order follow‑ups.
• Public sector: Application completion reminders.

Deadline breach stops the task (interrupting timer)

Use when

• A task must end automatically after a fixed duration.
• There is a clear SLA or cutoff.

Pattern in simple words

1. Start.
2. User task: Await confirmation. Attach an interrupting boundary timer set to a duration, for example 48 hours.
3. On timer: Service task Cancel booking. End Cancelled.
4. On message Confirmation received: Service task Schedule install. End Scheduled.

Note: The interrupting timer ends the user task when time expires.

Other scenarios

• Finance: Month‑end approval deadline triggers escalation.
• Healthcare: Consent not received by deadline leads to reschedule.
• Retail: Quote expiration triggers closure.
• Public sector: Unanswered notice triggers auto‑closure.
• Manufacturing: Unacknowledged purchase order triggers auto‑cancel.

Start on a schedule (timer start)

Use when

• The process must start on a recurring schedule.
• Execution is independent of external input.

Pattern in simple words

1. Timer start: Every day at a specific time, for example 05:00.
2. Service task: Optimize routes.
3. End Routes ready.
   Note: Define the recurrence schedule and timezone.

Other scenarios

• Finance: Daily cash‑flow report.
• Healthcare: Daily patient census updates.
• Retail: Nightly inventory sync.
• Manufacturing: Daily production scheduling.
• Public sector: Nightly data consolidation.

Staged escalation (laddered timers)

Use when

• You want multiple reminders before a final close.
• Work continues until the final condition or message arrives.

Pattern in simple words

1. Start.
2. User task: Await required documents.
3. Non‑interrupting timer after three days: Service task Send gentle reminder. End Reminder one sent.
4. Non‑interrupting timer after seven days: Service task Send urgent reminder. End Reminder two sent.
5. Interrupting timer after ten days total: Service task Close case for no response. End Closed.
6. Interrupting message Documents received: User task Review submission. End Reviewed.

Note: Use non‑interrupting timers for reminders and one interrupting control for closure.

Other scenarios

• Finance: Expense receipts overdue — reminder, warning, close.
• Healthcare: Missing pre‑op clearance — reminder, escalate, reschedule.
• Manufacturing: Vendor compliance documents — staged reminders before cutoff.
• Retail: Supplier purchase order confirmation — staged follow‑ups.
• Public sector: Missing grant application forms — staged reminders.