Scheduling turns the plan into a sequence: which job runs on which resource, in what order, starting when. It is where planning meets physics.
Finite versus infinite
Infinite scheduling assumes capacity is unlimited and back-schedules from due dates. It is simple and often adequate when one work center clearly constrains the plant.
Finite scheduling respects available hours and produces a sequence that can actually be run. It requires accurate routings, run rates and setup times — which is exactly why it fails in plants where that data has never been maintained.
Schedule the constraint
Most small plants have one or two resources that genuinely determine throughput. Scheduling those carefully and letting the rest follow is usually more effective than optimizing every work center.
Why schedules lose credibility
- Standards that do not match reality, so every job runs long.
- Material shortages discovered at release rather than at planning.
- Hot jobs inserted without removing anything.
- No feedback loop from actual completions back into the schedule.