Calculation | Description | Formula |
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Effective Time | The amount of production time that is producing good product. | |
OEE | The key performance indicator (KPI) showing overall equipment efficiency. | |
Overtime | Any time during which equipment is in production outside of a scheduled shift (unplanned production) and any shift that is designated as overtime. Shifts that are designated as overtime are considered part of the Overtime calculation rather than the Scheduled Time calculation. | Unplanned Production + (Overtime shift) |
Planned Production | Time during which equipment is scheduled to be in production. This is time during scheduled shifts. | |
Total Time | All time available for production, whether it is scheduled or unscheduled. | (Hours in the time range) * (number of pacemakers) |
Unaccounted Time | The difference between the operational time and production time, which has not yet been accounted for by loss events. | |
Unscheduled Time | Time during which equipment is not scheduled to be in production. This is time that is outside of a scheduled shift. |
Calculation | Description | Formula |
---|---|---|
Actual Cycle Time | For a job order: The time to produce one unit of material as calculated for the job order. This value is recalculated at the end of each production block. For a production block: The time to produce one unit of material as calculated for an individual production block. This value is calculated at the end of the production block. | For a job order: (Duration of all completed production blocks) / (Produced Quantity for all completed production blocks) For a production block: (Length of the current production block) / (Produced Quantity for the production block) |
Available Time | The time during which the equipment is actually available for production. | |
Downtime | Time during which the equipment is non-operational or not available for production. | |
Estimated Completion Time | The date and time when the job order will be complete, based on the current date and time and the calculated time remaining to complete the job order. | |
Expected Production | For a production block: The number of units that can be produced during a production block, based on ideal cycle time. For a job order: The number of units that could be produced during all completed production blocks for the job order, based on ideal cycle time. | For a production block: (Length of the current production block) / Ideal Cycle Time For a job order: (Duration of all completed production blocks) / Ideal Cycle Time |
Operational Time | The time during which the equipment was actually operational and producing. | |
Performance Loss | The time lost to small stops and speed loss. | |
Produced Quantity | The total number of units produced, both good counts and scrap counts. Also referred to as production count. | |
Production Time | The time spent producing units for a job order. | |
Remaining Time | The calculated time remaining to complete the job order, based on the remaining quantity of units to be produced and the ideal cycle time. | |
Scrap Time | The time loss equivalent for scrapped product. | |
Time Loss (for a job order) | The calculated time loss for a job order, calculated as the good count multiplied by the ideal cycle time for the material, subtracted from the duration of all completed production blocks for the job order. | |
Total Time Loss (for a production block) | The calculated time loss for a completed production block, calculated as the length of the production block minus the good time (the good count multiplied by the ideal cycle time). | |
Time Loss Unaccounted For (for a production block) | The time loss for the production block that is not yet accounted for, calculated as the total time loss for the production block minus the duration of all non-scrap loss events and the scrap time (the scrap count multiplied by the ideal cycle time). |
Variable | Description |
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Changeover | Time spent re-configuring equipment to produce a different material. |
Current Time | The current date and time. |
Good Count | The quantity of the total produced units for a job order which pass quality inspection. |
Ideal Cycle Time | The ideal time to produce one unit of material. The ideal cycle time is defined on each work center which produces the material. |
Planned Downtime | Time during which the equipment is expected to be non-operational, for example, during routine maintenance. |
Production Block | A defined period of production during which operators are asked to account for all materials that are produced and for any time loss. For more information, see Production Blocks. |
Scheduled Time | Time during any scheduled shift that is not designated as an overtime shift. Shifts that are designated as overtime are considered part of the Overtime calculation rather than the Scheduled Time calculation. |
Scrap Count | The quantity of the total produced units that fail inspection and must be scrapped. |
Small Stops | Time lost to minor stops in operation that are too small to be considered downtime. |
Speed Loss | A loss in efficiency while the equipment is operational. |
Target Quantity | The quantity of material to be produced for a job order. |
Unplanned Production | Any time during which equipment is in production outside of a scheduled shift. |
Unplanned Downtime | Unexpected time during which the equipment is non-operational, for example, during a power loss. |
Time Loss Accounted For (for a production block) | The total duration of all non-scrap loss events for the production block. |
Unknown | Time loss with an unknown cause. |