Track Asset Availability and Reliability in Field Service

After updating Asset Downtime Periods, reload the Asset record to see the updated cumulative downtime, cumulative unplanned downtime, availability, and reliability.

Availability and reliability are calculated when an uptime record start date is provided. When no uptime record start date is provided we don't calculate availability or reliability, and both fields are blank.

Availability and reliability values are calculated as the ratio between expected uptime and actual uptime, allowing for:

• planned and unplanned downtime (in calculating availability), that is Availability = (expected uptime - accumulated planned and unplanned downtime) / expected uptime
• unplanned downtime (in calculating reliability), that is Reliability = (expected uptime - accumulated unplanned downtime) / expected uptime

Average Time to Repair and Average Time Between Failures are calculated as follows:

• Average Time Between Failures = (Uptime in days - unplanned downtime in days) * Average uptime per day / number of unplanned downtime count
• Average Time to Repair = Unplanned downtime in hours / number of unplanned downtime count

Note Average Time to Repair and Average Time Between Failures are calculated only when Uptime Record Start Date and Unplanned Downtime Count information are provided. The “unplanned downtime count” is calculated on the asset and based on the number of "AssetDowntimePeriod" records that are categorized as “Unplanned”. To calculate Average Time Between Failures, the Uptime Record End Date must be provided as well.

Expected uptime is calculated as follows:

• If the uptime record end time is in the future or no uptime record end time is provided
  • Uptime = the average uptime per day * number of days between the uptime record start time and now.
• Else
  • Uptime = the average uptime per day * number of days between the uptime record start time and uptime record end time.

Planned and unplanned downtime are accumulated as follows:

• If the uptime record start time or uptime record end time change, the accumulated downtimes are recalculated based on the uptime record start time and uptime record end time. If there’s no uptime record end time, all records after the uptime record start time are accumulated, including records dated in the future.
• When a downtime record is added, updated, or deleted, the accumulated downtime is updated if the record’s downtime start or end date falls between the uptime record start time and uptime record end time. If there is no uptime record end time, all records after the uptime record start time are accumulated, including records dated in the future.

Note If you record details of planned downtime, we recommended that you maintain the uptime record end time as a date close to now. This ensures that the availability and reliability calculations exclude planned downtime information. If the uptime record end time isn't set, and the accumulated planned downtime exceeds the accumulated uptime to date, the reliability and availability statistics may be reported as negative.

The read only Outside Uptime Calculation Period checkbox indicates whether a record is excluded from the cumulative downtime calculation.

Note When reporting on asset downtime records, you can’t filter records using the Outside Uptime Calculation Period flag nor can you include the flag in the report