Throughput

What Is Throughput?

Throughput measures the total number of completed units exiting a production system or line over a given time period. It is the big-picture output metric — the one that most directly connects to revenue and customer fulfilment.

Distinction from Production Rate: Throughput is measured at the exit of the system (completed units only). Production Rate can be measured at any individual point and reflects instantaneous speed. Throughput is always less than or equal to the production rate of the bottleneck operation.

The Formula

Throughput = Total Units Completed ÷ Time Period

For multi-machine lines, throughput is measured at the final process step.

Data Requirements

Source	Required	What You Need
Machine Data	Yes	Production count at line end or across all machines
ERP/MES	Optional	Work order completion data (for facility-level throughput)

Throughput is a Phase 2 metric — it requires production counting to be reliable across the line.

Why It Matters

• Measures overall facility productivity — the single number that says “how much did we make?”
• Identifies system constraints — Theory of Constraints analysis starts with throughput
• Guides capacity expansion decisions — when throughput can’t meet demand, investment is needed
• Revenue correlation — higher throughput means higher revenue potential (assuming demand exists)

Best Practices

• Measure at line exit — only completed units count
• Track by product family for meaningful comparison
• Identify the bottleneck operations that limit throughput
• Balance the line to maximise throughput across all stations

Related Metrics

• Production Rate — the speed at individual process points
• Capacity Utilisation — how much of your theoretical capacity throughput represents
• Cycle Time — the time per unit that determines throughput rate
• OEE — OEE at the bottleneck directly limits throughput