Time slots
2 min read
Time slots let customers pick a delivery window — like 10:00–12:00 or 14:00–16:00 — alongside the date.
- Add windows to any rule. Define the slots you offer; they show under the chosen date on the storefront picker.
- Cap each window. Give a slot a capacity and it can sell out independently of the date.
- Live sell-out. Full slots grey out for shoppers automatically, so they only pick what you can fulfill.
- Enforced at checkout. The OrderRules Shopify Function blocks a sold-out slot even on Shop Pay or direct checkout URLs.
Slot windows are carrier-agnostic. At export, they map to each carrier's native slot codes — see Carrier CSV export.
Date capacity versus slot capacity
The two caps stack, and they answer different questions.
| Per-date capacity | Per-slot capacity | |
|---|---|---|
| What it caps | Total orders for a day | Orders inside one window |
| When it sells out | The whole date greys out | Only that window greys out |
| Use it for | A daily production ceiling | Van, crew or oven capacity per window |
| Enforced | At checkout, via Shopify Functions | At checkout, via Shopify Functions |
Set both when a day has a hard total and uneven demand across the windows — a full 10:00–12:00 shouldn't close the afternoon.