> For the complete documentation index, see [llms.txt](https://docs.hivel.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.hivel.ai/metrics-and-definitions/quality/maintenance.md).

# Maintenance

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[<mark style="color:purple;">**Understand New Work, Rework, Maintenance through examples**</mark>](/using-hivel/coding/understanding-rework-new-work-and-maintenance.md)
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### **Maintenance %**&#x20;

<div data-with-frame="true"><figure><img src="/files/FM3T5PSgsy5vpuFxK1dQ" alt="" width="563"><figcaption></figcaption></figure></div>

**Maintenance** refers to the lines of code modified that were written before the last 30 days / total lines of code added or modified.

* Less maintenance means that engineers write a very well-maintainable piece of code as the team builds new features.
* Higher maintenance represents a longer time to build new features or testing fatigue. When maintenance is high, estimates are usually off, as it's hard to account for maintenance during estimates.

#### Industry Benchmarking

<div data-with-frame="true"><figure><img src="/files/rlQjwycJKaaybdndv92i" alt="" width="563"><figcaption></figcaption></figure></div>