---
title: Maintenance and Failure
slug: litmusedge/product-features/analytics/key-performance-indicators/maintenance-and-failure
description: Learn more about the Maintenance and Failure KPI. 
docTags: 
createdAt: 2022-10-21T14:40:57.000Z
---

The **Maintenance and Failure** KPI mainly deals with the maintenance event and a fault/failure event in a production cycle.

# Maintenance and Failure Overview

- For **Maintenance events per cycle**, you can see the number of maintenance events (planned or unplanned) in a production cycle.
- For **Time since last maintenance**, If you know that a machine needs to be checked periodically, you can see the time elapsed between maintenance events.
- **Timestamp of last maintenance **is used to keep track of the previous time maintenance occurred.
- For **Number of faults / failures detected in a period**, you can see the number of failures that have occurred in a period.
- For **Time since last failure**, if you know that the machine needs to be checked periodically, you can see the time elapsed between failure events.
- **Timestamp of last failure **is used to keep track of the previous time when a failure occurred.
- The **timer interval **parameter is useful if the connected input tag is offline but you still want this KPI to look for a value every few seconds, defined by the timer.
- Within the KPI you can define how you want to trigger the mechanism of a maintenance event, and a failure event.
  For example, if you define **Maintenance From**: `0 `and **Maintenance To**: `1`, this means that when the value from the input tag, with the definition on the connection as *maintenance*, goes from 0 to 1, it is an indication that there was a maintenance event.
  **Failure From**: `2 `and **Failure To**: `4 `means whenever the input tag the definition on the connection as \*failure \*goes from 2 to 4, it is an indication that there was a failure event.

# Maintenance and Failure Parameter

| **Parameters**   | **Details**                                                                                                                                                         |
| ---------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Maintenance From | This parameter specifies the value at which a maintenance event is considered to be triggered.
                                                                 |
| Maintenance To   | This parameter specifies the value at which a maintenance event is considered to be completed.                                                                      |
| Failure From     | This parameter specifies the value at which a failure event is considered to be triggered.                                                                          |
| Failure To       | This parameter specifies the value at which a failure event is considered to be completed.                                                                          |
| Unit             | This parameter allows you to select the time unit in which the time since the last Maintenance/Failure will be displayed (Seconds, Minutes, Hours, Days, or Weeks). |
| Timer Interval   | Timer in milliseconds. If no event, use this timer to keep displaying the output continually. Enter zero to disable.                                                |

::Image[]{src="https://api.archbee.com/api/optimize/SSUUxKZUk9bFTEPNn_6Zo/NrkLKM7PVL5eUKX__qEUg_image.png" size="80" width="945" height="589" caption="Maintenance/Failure parameters" position="center" showCaption="true"}

:::hint{type="info"}
**Note: **When creating an analytics flow with *Maintenance and Failure *KPI, refer the [Use the Maintenance and Failure KPI](docId\:duQk86uO7BkD7xCtZtDe0) guide for more details.
:::