Definitions and metric calculations

Availability = Available Time / Potential Available Time

Available Time = Producing Time + Standby

Potential Available Time = Available Time + Setup + UDT

Producing Time
Sum of duration of producing periods of the part-kind. Can be classified using a rule or manually.

Standby
Sum of duration of standby periods of the part-kind. This classification can be used such that unknown downtimes while running a part are accounted for in the available time eg. when there are stops in the middle of the cycle though the machine is running.

Setup
Sum of duration of all setup periods.

Unplanned Downtimes (UDT)
Sum of duration of all unplanned downtimes like machine-tool-failure, unknown downtimes and other classified unplanned downtimes.

OEE is defined per part-kind of a machine.

OEE for a machine is the weighted average of the OEE for all the part-kinds of the machine (weighted average with respect to potential available time).

[(P1.OEE * P1.PT) + (P2.OEE * P2.PT) + (P3.OEE * P3.PT)] / (P1.PT + P2.PT + P3.PT)

PT = Potential Available Time

P1, P2 and P3 are three part-kinds.

Note:
If there is no target for cycle-time set or no good/bad parts data, CoroPlus® Machining Insights will return the value of OEE only based on Availability.

Performance = Ideal Cycle Time / Actual Cycle Time

Actual Cycle Time = Producing Duration/ Total Part Count

Ideal Cycle Time
Users can set the Ideal Cycle Time for a part-kind through targets.

Once that value is set, it will use that for computing performance by measuring it with respect to the actual cycle time.

Note:
If there are multiple Ideal Cycle Times set for the same part-kind of a machine, CoroPlus® MachiningInsights will consider the latest set for its calculation.

Note:
If there is no target set, CoroPlus® MachiningInsights will not consider the Performance metric from the OEE calculation and just return OEE based on Availability and Quality.

Note:
This will be for a part kind.
Can also be seen in the Part Metrics report for a specific part and Performance Grid report across all parts.

Quality = Number of good parts / Total number of parts

Total Part Count = Good part count + Bad part count

Good and Bad Part Count
Operator Panels will have an input where the operator can increase the number of good/bad parts operator can increment the good/bad part count.

Note:
If there are no good or bad parts data, CoroPlus® Machining Insights will not consider the Quality metric from the OEE calculation and just return OEE based on Availability and Performance

This is the main metric in CoroPlus® Machining Insights which is displayed in the dashboards and the reports

• Performance Grid
• Part Metrics
• Operator Metrics

Displayed in the reports

• Performance Grid
• Part Metrics
• Operator Metrics

Note:
Duration when operator is logged in is available only if CoroPlus® Machining Insights gets operator information currently from e.g. the operator panel.

Staffed Utilisation = Producing Duration / Total duration the operator is logged in

Producing duration = Whenever state is producing (green)

Total duration operator is logged in = when value of operator from BMS database is not empty

Staffed Utilisation is the percentage of time the machine is producing when the operator is logged in to the machine.

Note:
Duration when operator is logged in is available only if CoroPlus® Machining Insights gets operator information currently from e.g. the operator panel.

The cycle time of a part.

Note:
If CoroPlus® Machining Insights does not get the part count from either the machine data, the operator panel (as a manual part count) or via an integration with an external system the part cycle time can not be calculated