[Practitioner Guide]: Assessing Maintainability and Sustainability at Scale

### Practitioner Guide Topic (1 - 3 words)

Assessing Maintainability and Sustainability at Scale

### Is this a getting started guide or a more advanced guide for experienced users?

Advanced / Expert

### Primary Metrics (2 - 4 metrics for Getting Started Guides)

Primary Metrics:

- [Backlog Management Index]() (metric to be defined)
- [Review Efficiency Index]() (metric to be defined)
- [Time to Close](https://chaoss.community/?p=3446)
- [Contributor Absence Factor](https://chaoss.community/?p=3944)
- [Contributors](https://chaoss.community/?p=3630)
- [License Declared](https://chaoss.community/?p=3963)
- [Copyright Owner Concentration]() (metric to be defined)

### Why is this topic important? How will this help people improve their open source project and / or community? Who will benefit from this guide?

Software supply chains often rely on under-maintained open source projects that pose risk. This metrics model identifies risk factors that can point to under-maintained projects, allowing us to analyze a software supply chain at scale.

### How would you like to see this guide developed?

I am interested in using this guide, but I do not want to write it myself

### Additional Notes

Here is the doc where this metric will be developed: https://docs.google.com/document/d/1ubbVkeKuhkCXWxJj5vgeSgyIlUJ2D-MaJEBUlyQwd8k/edit?usp=sharing

@GeorgLink is driving this guide.