Production Capacity Planning for Small Manufacturers

Start with a work centre, not a factory-wide average

Capacity planning compares the work you need to do with the resource time available in a chosen period. A weekly total is a useful first check, but it cannot tell you whether a particular operation can start on Tuesday. Finite-capacity scheduling takes the next step: it places work against resource limits and existing commitments.

Start with one machine, or a group of genuinely interchangeable machines. Do not add spare packing hours to an overloaded kiln and call the factory balanced. Those hours belong to different resources. For each work centre, record working days, shifts, shift length and time that is unavailable for production.

A worked weekly capacity check

Consider two identical machines, each working one eight-hour shift for five days. That gives 80 gross machine-hours. Assume 15% is unavailable because of breaks and maintenance, leaving 68 hours. This allowance excludes changeovers, which we count separately as demand.

The arithmetic leaves 13 machine-hours of headroom. It does not prove that every delivery date can be met. Work may arrive late in the week, an operation may require a specific machine, or the same employee may be needed for two jobs at once.

Turn aggregate capacity into a usable schedule

For a more detailed plan, list the operation sequence for each order, eligible machines, processing duration, setup requirements and material availability. Check which resources must be available at the same time. Keep waiting time separate from machine occupation: an item waiting for inspection may not occupy a production machine, while a batch cooling inside a kiln still does.

LiftOrbit brings orders, machines, employees, materials and changeovers into a visual production plan. Use the Gantt chart to inspect the order of operations, then compare the initial plan with optimization results. A shorter plan is only useful if the inputs represent your actual production constraints.

What to do when the week is overloaded

First check whether the problem is missing data or genuine demand. If the overload is real, compare specific alternatives: a different eligible machine, an additional staffed shift, a revised order sequence or a later commitment. Do not erase setup time just to make the total fit. The changeover planning guide shows why sequence matters.

Repeat the check whenever orders, resource availability or processing estimates change. Compare scenarios using the same input snapshot; otherwise an apparent improvement may simply reflect different assumptions.

Concept reference: Microsoft Learn: finite capacity planning and scheduling. The worked examples in this guide are our own simplified calculations, not Microsoft or customer performance data.