Picker — logistics control system
An app for picking parts from the warehouse to the assembly line
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HCMS is an internal web application that gives Toyota's logistics team clear instructions when parts run short on the line. Operators confirm steps on a tablet, the system keeps a full history. Built from real process analysis on the shop floor — not from a paper spec.
Challenge
When an assembly line runs out of a part, every minute counts — a stopped line is a direct loss. Logistics used to handle emergencies from memory and pass instructions verbally. The team needed a system that shows in real time where a part is, who delivers it, and in what order people proceed, so the response works even under pressure.
Solution
After analysing real processes on the shop floor, I built the domain model, use case map, and a web application with a tablet interface for operators and a desktop view for shift leaders. The app walks people through each step, tracks state, keeps history, and hands tasks across shifts. Eighteen years of first-hand Toyota experience shaped details an outside vendor would never spot.
Result
The client reports annual savings of at least 3 million CZK — equivalent to one full-time worker per shift across three shifts. During model-change periods, when abnormalities peak, savings reportedly multiply further. The system has been in production since 2021 and serves as a reference for what software designed by people who actually know the operation looks like.