Meaning
Limitation within a production system that restricts total output. A capacity constraint identifies the specific resource, such as machine hours or labor availability, that prevents a process from meeting higher demand. It defines the maximum throughput of a line and dictates the rhythm of the entire manufacturing operation.
Throughput Ceiling
A bottleneck appears when a single stage operates at a lower rate than the surrounding units. Managing a capacity constraint requires identifying whether the limit is physical, such as a furnace volume, or organizational, such as shift scheduling. While a capability describes what a machine can do, the constraint dictates how much it actually produces over time.
Readiness Threshold
Transitioning from a pilot run to full scale production often reveals hidden limits in the supply chain. Engineers must distinguish between a temporary delay and a permanent capacity constraint before committing to high volume contracts. Calling for an expansion too early incurs heavy capital costs without a guaranteed return on the investment.
Constraint Impact
Operational consequences for ignoring these limits are visible in rising work in progress inventory and missed delivery dates. Because a capacity constraint governs the speed of the whole plant, any improvement made at a non-bottleneck station fails to increase total yield. Efficiency gains only matter when they occur at the primary point of restriction.
