Plant ApplicationsAbout Non-Productive Time in Downtime Calculations
When accessing the KPIs in Downtime, OEE Dashboard, and Reports, you can include or exclude non-productive time (NPT) in the downtime calculation of KPIs.
The following sections describe various scenarios of downtime calculations.
Scenario 1: Downtime Duration is Within NPT Duration
The following table describes the scenario when the NPT event starts before the start time of the downtime event and ends after the end time of the downtime event. The table further includes the downtime calculation in this scenario.
| Time Entry Type | Start Time (mm/dd/yy hh: mm) | End Time (mm/dd/yy hh: mm) | Duration (mins) | Downtime Calculation (mins) | |
|---|---|---|---|---|---|
| Include NPT | Exclude NPT | ||||
| Downtime | 5/10/18 5:08 | 5/10/18 5:10 | 2 | 0 | 2 |
| NPT | 5/10/18 5:05 | 5/10/18 5:15 | 10 | ||
The downtime duration is calculated as follows:
- When NPT is included: The downtime duration is ignored by the application. In this scenario, the downtime duration appears as 0 mins.
- When NPT is excluded: The actual downtime duration appears. In this scenario, the downtime duration appears as 2 mins.
Scenario 2: Downtime Starts Before NPT Starts and Ends Before NPT Ends
The following table describes the scenario when the downtime event starts after the start time of the NPT event and ends before the end time of the NPT event. The table further includes the downtime calculation in this scenario.
| Time Entry Type | Start Time (mm/dd/yy hh: mm) | End Time (mm/dd/yy hh: mm) | Duration (mins) | Downtime Calculation (mins) | |
|---|---|---|---|---|---|
| Include NPT | Exclude NPT | ||||
| Downtime | 5/10/18 5:17 | 5/10/18 5:25 | 8 | 3 | 8 |
| NPT | 5/10/18 5:20 | 5/10/18 5:30 | 10 | ||
The downtime is calculated as follows:
- When NPT is included: Only the downtime duration before the NPT event starts appears as the downtime duration. In this scenario, the downtime duration appears as 3 mins.
- When NPT is excluded: The actual downtime duration appears. In this scenario, the downtime duration appears as 8 mins.
Scenario 3: Downtime Starts After NPT Starts and Ends After NPT Ends
The following table describes the scenario when the downtime event starts after the start time of the NPT event and ends after the end time of the NPT event. The table further includes the downtime calculation in this scenario.
| Time Entry Type | Start Time (mm/dd/yy hh: mm) | End Time (mm/dd/yy hh: mm) | Duration (mins) | Downtime Calculation (mins) | |
|---|---|---|---|---|---|
| Include NPT | Exclude NPT | ||||
| Downtime | 5/10/18 5:47 | 5/10/18 5:52 | 5 | 2 | 5 |
| NPT | 5/10/18 5:40 | 5/10/18 5:50 | 10 | ||
The downtime is calculated as follows:
- When NPT is included: Only the downtime duration after the NPT event ends appears as the downtime duration. In this scenario, the downtime duration appears as 2 mins.
- When NPT is excluded: The actual downtime duration appears. In this scenario, the downtime duration appears as 5 mins.
Scenario 4: Downtime Starts Before NPT Starts and Ends After NPT Ends
The following table describes the scenario when the downtime event starts before the start time of the NPT event and ends after the end time of the NPT event. The table further includes the downtime calculation in this scenario.
| Time Entry Type | Start Time (mm/dd/yy hh: mm) | End Time (mm/dd/yy hh: mm) | Duration (mins) | Downtime Calculation (mins) | |
|---|---|---|---|---|---|
| Include NPT | Exclude NPT | ||||
| Downtime | 5/10/18 5:34 | 5/10/18 5:41 | 7 | 2 | 7 |
| NPT | 5/10/18 5:35 | 5/10/18 5:40 | 5 | ||
The downtime is calculated as follows:
- When NPT is included: The sum of downtime durations before the NPT event starts and after the NPT event ends appears as the downtime duration. In this scenario, the downtime duration appears as 2 mins.
- When NPT is excluded: The actual downtime duration appears. In this scenario, the downtime duration appears as 7 mins.