On-time delivery is the share of orders that reach the customer by the promised date. It’s the metric customers actually feel, and the one most likely to trigger a “where is my order?” ticket when it slips.
You Can Verify This Yourself
Unlike most warehouse metrics, OTD doesn’t depend on your 3PL’s self-reporting. You can rebuild it from carrier tracking data: promised date against actual delivery scan. That makes it one of the few 3PL performance numbers a brand can hold on its own.
What It Hides
A good OTD can cover for a slow warehouse that fast shipping bailed out. It can also make a quick warehouse look bad when the carrier runs late. To see where a delay came from, split the timeline into total fulfillment time (order to carrier pickup) and transit. OTD tells you the score. The stages tell you why. It’s also the “on-time” half of OTIF.