Examples
Examples
Try the starting example
- Parcels: ID, desired collection date, collection opens, closes inclusive, working lead days, planned dispatch date or none, contents joined by |
- P1,2026-10-20,2026-10-19,2026-10-21,3,2026-10-15,Food|Fuel P2,2026-10-25,2026-10-24,2026-10-24,2,2026-10-20,Food
- Shipping weekdays, Monday 1 through Sunday 7
- 1,2,3,4,5
- Excluded shipping dates, comma-separated, or none
- none
- Latest modeled dispatch by parcel for desired collection
- P1: 2026-10-15; P2: No collection in supplied window
- Modeled ready date for planned dispatch
- P1: 2026-10-20; P2: 2026-10-22
- Parcels ready by desired collection within supplied window
- P1
- Parcels with desired collection outside supplied window
- P2
- Supplied parcel contents
- P1: Food|Fuel; P2: Food
Try another scenario
- Parcels: ID, desired collection date, collection opens, closes inclusive, working lead days, planned dispatch date or none, contents joined by |
- P1,2026-10-20,2026-10-19,2026-10-21,3,2026-10-16,Food|Fuel P2,2026-10-25,2026-10-24,2026-10-24,2,2026-10-20,Food
- Shipping weekdays, Monday 1 through Sunday 7
- 1,2,3,4,5
- Excluded shipping dates, comma-separated, or none
- none
- Latest modeled dispatch by parcel for desired collection
- P1: 2026-10-15; P2: No collection in supplied window
- Modeled ready date for planned dispatch
- P1: 2026-10-21; P2: 2026-10-22
- Parcels ready by desired collection within supplied window
- None
- Parcels with desired collection outside supplied window
- P2
- Supplied parcel contents
- P1: Food|Fuel; P2: Food
Calculation method
Calculation method
Latest modeled dispatch by parcel for desired collection
For an in-window desired collection date first move to the latest shipping-ready working date on/before collection, then subtract supplied working lead days excluding that ready day.
Modeled ready date for planned dispatch
Roll a nonworking dispatch forward, then add working lead days excluding effective dispatch day. No dispatch yields Unplanned.
Parcels ready by desired collection within supplied window
Require ready date≤desired collection and desired collection within inclusive window; no extra stay is assumed.
Parcels with desired collection outside supplied window
Desired collection before opening or after closing.
Supplied parcel contents
Repeat explicit content labels for operational checking; no item demand or shipping permission is inferred.
Symbols and units
- a
- Parcels: ID, desired collection date, collection opens, closes inclusive, working lead days, planned dispatch date or none, contents joined by |
- b
- Shipping weekdays, Monday 1 through Sunday 7
- c
- Excluded shipping dates, comma-separated, or none
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions & limits
Assumptions & limits
- A supplied shipping/calendar scenario, not a courier delivery guarantee, live opening-hours lookup or permission to ship an item. Working calendars, lead times, collection dates and contents are external inputs.
Are these inputs private?
These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.
Further reading
OpenStax: ratios and rates; all itinerary rates, limits and scenario rules are supplied inputs ↗
Background reading; this does not imply endorsement or independent review of SumFizz.