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Delivery Window Transit Duration Estimator

The Delivery Window Transit Duration Estimator measures how much time a shipment spends from dispatch until arrival and compares that duration with the delivery window promised to the customer. It separates elapsed transit time from the remaining time inside the stated window, making it useful for route planning, carrier review, and order-level service checks.

Use the result when you need a quick operational view of whether a shipment is early, inside the window, or beyond it. The calculator works with a planned dispatch time, an actual or expected arrival time expressed as elapsed hours, and the allowed delivery-window duration. It is an estimate of timing performance, not a prediction of traffic, weather, customs, or carrier disruptions.

Transit timing inputs

hours
hours
hours
hours
Result
—
Total transit duration
Window variance—
Delivery status—
Window consumed—

1. Enter dispatch delay
Add any time between the planned dispatch and the actual departure.

2. Add linehaul time
Enter the expected or observed travel time while the shipment is moving between origin and destination.

3. Include arrival handling
Add unloading, terminal, or receiving time that must occur before delivery is considered complete.

4. Set the promised window
Enter the total number of hours allowed from the planned dispatch point through completed arrival.

5. Review timing status
Compare total transit duration with the window variance and percentage of the window consumed.

Total transit duration = Dispatch delay + Linehaul time + Arrival handling time
Window variance = Promised delivery window − Total transit duration
Window consumed (%) = Total transit duration ÷ Promised delivery window × 100

Where:

  • Dispatch delay = hours before the shipment actually departs
  • Linehaul time = hours in transport
  • Arrival handling time = hours needed to complete receipt
  • Promised delivery window = total allowed hours

Assumptions: All inputs use the same elapsed-hour basis. A positive window variance means time remains; a negative value means the delivery exceeded the stated window.

What the result means

Use the primary result together with the supporting values to evaluate the specific supply-chain scenario represented by your inputs.

This calculator is a planning estimate. Operational definitions, data quality, and local business rules can change how the result should be applied.

Given:

  • Dispatch delay = 1.5 hours
  • Linehaul time = 19 hours
  • Arrival handling time = 1 hour
  • Promised delivery window = 24 hours

Calculation:
Total transit duration = 1.5 + 19 + 1 = 21.5 hours
Window variance = 24 − 21.5 = 2.5 hours
Window consumed = 21.5 ÷ 24 × 100 = 89.58%

Result: 21.5 hours, with 2.5 hours remaining in the window.

Interpretation: The shipment uses about 89.6% of the allowed delivery window, so it remains inside the promised time but has limited buffer.

Should I use planned or actual transit time?

Use actual elapsed time for post-delivery performance review and planned time for forecasting. Keep all inputs on the same basis when comparing shipments.

Does the delivery window start at order placement?

Only if your operation defines it that way. This calculator assumes the window starts at the planned dispatch point, so adjust the inputs if your customer promise starts earlier.

What does a negative window variance mean?

It means the calculated transit duration is longer than the promised window. The absolute value shows how many hours the shipment is beyond the window.

Can I include customs or terminal delays?

Yes. Add those delays to the dispatch, linehaul, or arrival-handling input according to where they occur, provided you avoid counting the same time twice.

How is this different from on-time delivery rate?

This estimator evaluates the timing of one shipment or scenario. An on-time delivery rate summarizes the share of many deliveries that met a defined deadline.