Cycle Time Calculator
Calculate process cycle time, value-added ratio, and process efficiency from active work time versus total elapsed time.
🔄 Operations📐 Cycle time = total elapsed time / units completed; efficiency = value-added time / cycle time💼 Business
Units completed
Total elapsed time (hours)
Value-added time per unit (minutes)
Wait/queue time per unit (minutes)
Rework rate (%)
Please enter valid values.
Formula & Reference
| Variable | Symbol | Formula | Units |
|---|---|---|---|
| Cycle Time Calculator | — | Cycle time = total elapsed time / units completed; efficiency = value-added time / cycle time | time per unit |
Step-by-Step Examples
Example 1
Service Process
340 units in 40 hours, 3.2 min value-added, 2.8 min queue, 6% rework.
- Cycle time = (40 × 60) / 340 = 7.06 min/unit
- Process efficiency = 3.2 / 7.06 = 45.3%
- Non-value-added = 3.86 min per unit
- At 6% rework, effective cycle per good unit = 7.51 min
✓ 7.06 min/unit, 45.3% efficiency
Example 2
Low Efficiency Process
200 units in 50 hours, 1.5 min value-added.
- Cycle time = 15.0 min/unit
- Efficiency = 1.5 / 15.0 = 10.0%
- 90% of elapsed time is waiting, moving, or queuing
✓ 15.0 min/unit, 10.0% efficiency
Example 3
Rework Impact
Cycle time 8 min, 20% rework rate.
- Effective cycle = 8 / 0.80 = 10.0 min per good unit
- Rework adds 25% to effective cycle time
- Quality problems consume capacity invisibly
✓ 10.0 min per good unit
Real-World Applications
Lead Time Reduction
Cycle time is the building block of total lead time, and reducing it shortens customer delivery times directly.
Waste Identification
Process efficiency below 20% means most elapsed time adds no value — usually queuing, transport, or waiting.
Capacity Calculation
Available time divided by cycle time gives realistic capacity for planning and order promising.
Rework Visibility
Expressing cycle time per good unit rather than per unit started exposes the hidden capacity cost of quality problems.
Common Mistakes to Avoid
⚠️
Measuring only value-added time
Value-added time is typically a small fraction of cycle time. Optimising it while ignoring queue time addresses the minority of the problem.
⚠️
Confusing cycle time with lead time
Cycle time covers the process itself; lead time includes order entry, queuing, and delivery. Customers experience lead time.
⚠️
Ignoring rework in capacity planning
If 20% of units need rework, effective capacity is 20% lower than the raw cycle time suggests.
Frequently Asked Questions
What is cycle time? ▾
The average time to complete one unit through a process, calculated as total elapsed time divided by units completed.
What is process cycle efficiency? ▾
Value-added time divided by total cycle time. Many unimproved processes run below 10%, meaning most elapsed time adds no value.
How is cycle time different from takt time? ▾
Cycle time is how long your process actually takes. Takt time is how fast it needs to be to meet demand. Cycle time must be at or below takt.
How does rework affect cycle time? ▾
It reduces effective throughput. Dividing cycle time by one minus the rework rate gives the true time per good unit produced.
How do I reduce cycle time? ▾
Attack non-value-added time first — queuing, batching, handoffs, and waiting typically dominate and are cheaper to fix than the work itself.