Episode
Why Your ERP Can't Build an Optimal Production Schedule
- Published
- Sep 16, 2026
- Duration seconds
- 6266
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Summary
Your ERP can calculate production dates, explode demand through MRP, manage routings, inventory, purchase orders, and production orders. But that does not automatically mean it can create a production schedule that your factory can actually execute. In this episode, we break down the gap between ERP planning and finite production scheduling — and explain why a schedule can look perfectly reasonable in the ERP while multiple orders are competing for the same machine at the same time. THE INFINITE-CAPACITY PROBLEM Traditional ERP planning can place demand against resources without reserving finite blocks of actual machine time. This “infinite capacity” assumption is useful for demand and material planning, but it becomes a problem when planned dates are treated as executable shop-floor commitments. A capacity report may show that a machining centre has 40 hours of demand against only 16 available hours. It identifies the overload — but it does not decide which orders should run first, which should move, or how those decisions affect downstream operations. CAPACITY IS MORE THAN MACHINE HOURS Real production capacity depends on much more than a work-centre calendar. Machines have downtime. Operators have qualifications and shift patterns. Fixtures and tooling may already be occupied. Quality inspections consume resources. Maintenance removes capacity. And an eight-hour shift rarely provides eight hours of usable production time. A feasible schedule therefore has to consider the combination of machines, people, tooling, fixtures, calendars, maintenance, and process rules. WHY SEQUENCE MATTERS Production sequence can dramatically change the result. Running similar product families together might require only one major setup. Alternating between families can create repeated t…