---
title: oee.computeAPQ() function
description: >
  `oee.computeAPQ()` computes availability, performance, and quality (APQ)
  and overall equipment effectiveness (OEE) using two separate input streams:
  **production events** and **part events**.
menu:
  flux_v0_ref:
    name: oee.computeAPQ
    parent: experimental/oee
    identifier: experimental/oee/computeAPQ
weight: 201
---

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`oee.computeAPQ()` computes availability, performance, and quality (APQ)
and overall equipment effectiveness (OEE) using two separate input streams:
**production events** and **part events**.

## Output schema
For each input table, `oee.computeAPQ` outputs a table with a single row and
the following columns:

- **_time**: Timestamp associated with the APQ calculation.
- **availability**: Ratio of time production was in a running state.
- **oee**: Overall equipment effectiveness.
- **performance**: Ratio of production efficiency.
- **quality**: Ratio of production quality.
- **runTime**: Total nanoseconds spent in the running state.

##### Function type signature

```js
(
    idealCycleTime: A,
    partEvents: stream[B],
    plannedTime: C,
    productionEvents: stream[D],
    runningState: E,
) => stream[{
    F with
    runTime: H,
    quality: float,
    performance: float,
    oee: float,
    availability: float,
    _time: G,
    _stop: G,
}] where B: Record, D: Record, E: Equatable
```

{{% caption %}}
For more information, see [Function type signatures](/flux/v0/function-type-signatures/).
{{% /caption %}}

## Parameters

### productionEvents
({{< req >}})
Production events stream that contains the production
state or start and stop events.

Each row must contain the following columns:
- **_stop**: Right time boundary timestamp (typically assigned by `range()` or `window()`).
- **_time**: Timestamp of the production event.
- **state**: String that represents start or stop events or the production state.
Use [`runningState`](#runningstate) to specify which value in the `state`
column represents a running state.

### partEvents
({{< req >}})
Part events that contains the running totals of parts produced and
parts that do not meet quality standards.

Each row must contain the following columns:
- **_stop**: Right time boundary timestamp (typically assigned by
`range()` or `window()`).
- **_time**: Timestamp of the parts event.
- **partCount:** Cumulative total of parts produced.
- **badCount** Cumulative total of parts that do not meet quality standards.

### runningState
({{< req >}})
State value that represents a running state.



### plannedTime
({{< req >}})
Total time that equipment is expected to produce parts.



### idealCycleTime
({{< req >}})
Ideal minimum time to produce one part.