How a delivery firm cut false delay texts from 26% to 5% with smarter rules

A delivery company introduced automated delay texts to customers when estimated arrival times shifted more than 30 minutes beyond the booked window, initially reducing inbound 'where is my delivery?' calls by around 20%. However, over the following year, complaints shifted: customers were receiving inaccurate or multiple conflicting delay notifications, with a six-week audit revealing that 26% of delay texts were sent for deliveries that actually arrived on time. The false alerts were triggered by temporary GPS signal loss, legally required driver breaks, and route reordering — all short-lived fluctuations the route planner's estimate was never designed to treat as final. The company overhauled its rules to require an estimate to remain late for 15 minutes before any message is sent, cap updates at two per delivery, and report a time window rather than a precise minute. False delay notifications have since dropped to roughly 1 in 20, and the disruptive follow-up calls have largely ceased.