# MTBF & MTTR

KPIs, measured in seconds, which indicate, respectively, the reliability and maintainability of a plant or machinery.

### MTBF (Mean Time Between Failure) <a href="#mtbf-mean-time-between-failure" id="mtbf-mean-time-between-failure"></a>

The average time between the occurrence of one failure and the start of the next. The higher it is, the more reliable the machinery is.

### MTTR (Mean Time To Repair) <a href="#mttr-mean-time-to-repair" id="mttr-mean-time-to-repair"></a>

The efficiency of maintenance service. The lower it is, the more responsive maintenance is in solving problems.

<figure><img src="https://docs-en.40mat.com/~gitbook/image?url=https%3A%2F%2Fcontent.gitbook.com%2Fcontent%2Fhl1Jd2aAwMOKTLsBc7V1%2Fblobs%2Fi2OKhO7Y6tRUBu7UHsHU%2Fmttf-mttr-mtbf.png&#x26;width=768&#x26;dpr=4&#x26;quality=100&#x26;sign=b8a6220e&#x26;sv=2" alt=""><figcaption></figcaption></figure>


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.pelabellers.com/12WwhDoYkf9xX4gpwfnK/appendix/mtbf-and-mttr.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.