Effective Downtime
- Last UpdatedFeb 25, 2025
- 2 minute read
Virtual Downtime is configured with a target expression and an actual expression. The Virtual Downtime event triggers when the result of the actual value expression is less than the target expression value multiplied by the threshold percentage. When this occurs, the Virtual Downtime event integrates the actual and target values to determine the effective duration and downtime percentages.
For example, a Virtual Downtime event that has a duration of 1 hour and a production rate of 75% (has an average actual value over the hour of 75%) is equivalent to a Real Downtime event of 15 minutes. Therefore, the effective duration of downtime is 15 minutes.
The Virtual Downtime event continues to monitor production levels after it is captured to estimate the actual production rate during the entire event.
Example: Virtual Downtime
In this example, the target rate is 1000 in a 30 minute period. This is a rate of 2000/hr.
A Virtual Downtime event occurs that lasts for 90 minutes.
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In the first 30 minutes of Virtual Downtime, the actual production rate is 750 for a percentage of 75%.
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In the second 30 minutes of Virtual Downtime, the actual production rate is 850 for a percentage of 85%.
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In the last 30 minutes of Virtual Downtime, the actual production rate is 600 for a percentage of 60%.
Although the production rates are not consistent throughout the course of the Downtime, it is possible to calculate, based on target rates and actual rates, how many minutes production time were effectively in real downtime.
For the total duration of 90 minutes, the effective duration of downtime is 24 minutes. In other words, the production loss is equal to being in real Downtime, 0% capacity, for 24 minutes.
The downtime percentage is 26.67%.