Skip to content

OEE Statistics

Subscription Tier Required

This feature requires the Premier subscription tier or higher.

This topic explains how key OEE statistics are calculated.

See the list of available statistics.

Definitions

  • \(\text{A}\) = Availability
  • \(\text{P}\) = Performance
  • \(\text{Q}\) = Quality
  • \(\text{OEE}\) = Overall (OEE)

These statistics are usually reported as a percentage.

Availability

\[ \text{A} = \frac{\text{Available Time}}{\text{Scheduled Time}} \]

If any of the following are true, \(\text{A}\) will not be calculated:

  • \(\text{Available Time}\) is not set.
  • \(\text{Scheduled Time}\) is not set.
  • \(\text{Scheduled Time} \leq 0\).

Performance

\[ \text{P} = \frac{\text{Ideal Cycle Time} \times \text{Total Parts}}{\text{Available Time}} \]

If any of the following are true, \(\text{P}\) will not be calculated:

  • \(\text{Ideal Cycle Time}\) is not set.
  • \(\text{Total Parts}\) is not set.
  • \(\text{Available Time}\) is not set.
  • \(\text{Available Time} \leq 0\).

Quality

\[ \text{Q} = \frac{\text{Good Parts}}{\text{Total Parts}} \]

If any of the following are true, \(\text{Q}\) will not be calculated:

  • \(\text{Good Parts}\) is not set.
  • \(\text{Total Parts}\) is not set.
  • \(\text{Total Parts} \leq 0\).

Overall (OEE)

If all three statistics, \(\text{A}\), \(\text{P}\), and \(\text{Q}\) are calculated, then

\[ \text{OEE} = \text{A} \times \text{P} \times \text{Q} \]

For each of \(\text{A}\), \(\text{P}\), and \(\text{Q}\) that was not calculated, substitute \(1\) into the preceding equation for the associated statistic.

Statistical Listing

Stat Description
Availability Also commonly known as Uptime, this indicates the percentage of scheduled running time that the process was actually running.
Count Records Total number of records.
Count Records With Real Time Failures Number of records with at least one real-time failure.
Count Total Real Time Failures Total number of real-time failures in the retrieval.
OEE Overall OEE, calculated as the product of Availability, Performance, and Quality.
Percent Records with Real Time Failures The percentage of the number of records with at least one real-time failure, out of the total number of records.
Performance Also commonly known as Speed or Process Rate, this indicates the actual speed of the process as a percentage of its designed speed.
Quality The Process Yield - good parts as a percentage of total parts produced.
Sum Available Time Sum of all records' Available Time.
Sum Downtime Sum of all records' Downtime.
Sum Good Parts Sum of all records' Good Parts.
Sum Scheduled Time Sum of all records' Scheduled Time.
Sum Total Parts Sum of all records' Total Parts.