Actual cycle time represents the time taken to produce one unit of product under optimal conditions.
This metric plays a vital role in evaluating Overall Equipment Effectiveness (OEE) in manufacturing environments.
Actual cycle time is measured from the start of production until the unit is complete. It includes all processing time, excluding any breaks or downtimes.
By tracking actual cycle time, you can pinpoint areas of inefficiency, enable improvements, and increase productivity.
For example, if actual cycle time for a machine exceeds its target cycle time, it indicates potential issues that need addressing.
How It Differs from Other Time Measurements
Actual cycle time differs from theoretical cycle time, which is the ideal duration based purely on machine capabilities without interruptions.
It contrasts with lead time, which measures the total time from order to delivery, not just production.
Unlike these other measurements, actual cycle time directly correlates to OEE metrics, impacting equipment performance and resource allocation in manufacturing.
What Affects Actual Cycle Time?
Machine Efficiency
Machine efficiency directly impacts actual cycle time.
If machines operate at optimal levels, they produce units more quickly.
Equipment wear and maintenance issues can slow production down, increasing cycle time.
Regular maintenance schedules and upgrades lead to better performance, reducing delays and downtime.
Product Complexity
Product complexity also affects actual cycle time.
More intricate products generally require longer manufacturing processes. Different parts and assembly techniques add time.
Simplifying designs or using advanced manufacturing techniques can streamline production.
This adjustment can result in shorter cycle times and enhanced OEE.
How to Calculate Actual Cycle Time in OEE
Step 1: Identify the Start and End Points. Start timing when production begins on a unit and stop upon its completion.
Step 2: Record Total Production Time. Document the total time taken to produce the unit, including any productive work.
Step 3: Exclude Non-productive Time. Remove any breaks, downtimes, or delays from your total time to focus solely on active production.
Step 4: Determine Cycle Time. The final figure represents your actual cycle time for producing one unit. This data helps identify potential areas for improvement in your processes.
Make sure to avoid these 5 mistakes for an accurate OEE:
- Ignoring non-productive time
- Inaccurate timing (double check your start and stop time)
- Not accounting for variability in machine performance of product complexity
- Forgetting to document cycle times on a regular basis.