---
title: How do I set delivery time estimates (EDD) for my products?
description: "**Estimated Delivery Dates (EDDs) must be built on data — not assumptions.** In simple terms, EDDs depend on three key factors: **EDD = Courier SLA + Origin–destination transit time + Fulfilment lead time** The smart approach is to **start conservative**,…"
url: "https://unicommerce.com/everything-ecommerce/how-do-i-set-delivery-time-estimates-edd-for-my-products/"
updated: "2026-02-19"
category: Seller Journey
tags:
  - Courier SLA management
  - Delivery predictability ecommerce
  - Ecommerce delivery time estimation
  - Estimated delivery date (EDD)
  - Fulfilment lead time optimization
---

# How do I set delivery time estimates (EDD) for my products?

**Estimated Delivery Dates (EDDs) must be built on data — not assumptions.**

In simple terms, EDDs depend on three key factors:

**EDD = Courier SLA + Origin–destination transit time + Fulfilment lead time**

The smart approach is to **start conservative**, continuously measure actual delivery performance,
 and then **shorten EDDs confidently** as your data becomes more reliable.

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**YES — How Unicommerce Helps You Set Reliable EDDs 📦**

Overpromising delivery dates leads to missed expectations and higher support tickets.
 Unicommerce helps you avoid this by making EDDs practical, measurable, and actionable:

- ✅ **Calculates realistic EDDs** using courier SLAs and warehouse fulfilment rules
- ✅ **Factors in origin–destination transit times** to avoid zone-level miscalculations
- ✅ **Surfaces SLA exceptions early** so teams can take corrective action

The outcome? **Consistent delivery promises, fewer escalations, and stronger customer trust.**

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**📘 Read More**

[**Understanding EDD logic & best practices**](https://www.shipway.com/ebook-estimated-delivery-dates)

[**How to improve delivery predictability in ecommerce**](https://blog.shipway.com/how-to-choose-the-right-shipping-carrier-for-your-ecommerce-business/)