SUMMARY
Speed Loss measures the production time lost when a line is running below its validated speed. It helps quantify efficiency losses that occur during operation, even when the line is not stopped.
WHAT THIS IS
- Speed Loss is an OEE (Overall Equipment Effectiveness) performance metric that compares a line’s expected output while running against its actual output. It represents the amount of production time lost because the line operated slower than its validated speed.
- Unlike downtime, Speed Loss only applies when the line is running. Periods when the line is fully stopped are excluded from the calculation.
WHY IT MATTERS
- Speed Loss highlights hidden productivity losses that are not captured by downtime alone.
- It helps identify situations where equipment is operational but producing less than expected.
- Understanding Speed Loss provides a more accurate view of line performance and overall efficiency.
WHEN YOU WOULD USE THIS
- Use this when:
- Evaluating production performance as part of OEE analysis.
- Identifying efficiency losses caused by reduced operating speed.
HOW IT WORKS
- Speed Loss is calculated by comparing the validated speed of a line with its realized speed during uptime.
- The realized speed is based on the number of units produced divided by the time the line was running.
- Any difference between the validated speed and realized speed is converted into lost production time.
- Time when the line is fully stopped is excluded from the expected output calculation, ensuring that only running time is evaluated.
KEY TERMS / COMPONENTS
- Validated Speed:
- The expected production rate of a line under normal operating conditions.
- The expected production rate of a line under normal operating conditions.
- Realized Speed:
- The actual production rate achieved during uptime, calculated as produced units divided by uptime.
- The actual production rate achieved during uptime, calculated as produced units divided by uptime.
- Uptime:
- The period during which the line is running and capable of producing output.
- The period during which the line is running and capable of producing output.
- Speed Loss:
- The production time lost due to operating below the validated speed.
COMMON MISUNDERSTANDINGS
- Speed Loss is not the same as downtime. Downtime measures periods when production is stopped, while Speed Loss measures reduced performance during operation.
- A line can have zero downtime and still experience significant Speed Loss if it runs below its validated speed.
- Stopped time is not included in the expected output used for the Speed Loss calculation.