> For the complete documentation index, see [llms.txt](https://docs.veedna.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.veedna.com/sbom360/projects/irl.md).

# IRL

### What is LIRL?

LIRL stands for Lineaje Inherent Risk Score. The inherent risk is represented as LIRL in a scale of 0-10

* ZIRL 0: Zero IRL. Zero risk with this component/project. This is the preferred IRL.
* LIRL : Low IRL. Risk score falls between 0.1 to 3.9. The component/project carries a lower risk
* MIRL: Medium IRL. Risk score falls between 4.0 to 6.9. The component/project carries a medium risk
* HIRL: High IRL. Risk score falls between 7.0 to 8.9. The component/project carries a high risk
* CIRL 4: Critical IRL. Risk score falls between 9.0 to 10.0. The component/project carries critical risk

### How is IRL calculated?

IRL is calculated based on 4 factors - age, vulnerability score, code quality score, security posture score. IRL is calculated as a weighted average.

                                    **IRL of project = mean(components IRL in dependency tree)**

<table data-header-hidden><thead><tr><th width="165"></th><th width="150"></th><th></th></tr></thead><tbody><tr><td><strong>IRL contributor</strong></td><td><strong>Weightage</strong></td><td><strong>Description</strong></td></tr><tr><td>Vulnerability</td><td>80% weightage</td><td><ul><li>3.0 score if atleast one exploitable vulnerability found</li><li>2.0 score if atleast one critical vulnerability found</li><li>1.5 score if atleast one high vulnerability found</li><li>1.0 score if atleast one medium vulnerability found</li><li>0.5 score if atleast one low vulnerability found</li></ul></td></tr><tr><td>Unmaintained Component</td><td>10% weightage</td><td><ul><li>1.0 score based on maintained/unmaintained (0.0 or 1.0)</li></ul></td></tr><tr><td>Security Posture</td><td>5% weightage</td><td><ul><li>0.5 rating based on atleast one security posture issue (0.0 or 0.5)</li></ul></td></tr><tr><td>Code Quality</td><td>5% weightage</td><td><ul><li>0.5 rating based on atleast one Code Quality issue (0.0 or 0.5)</li></ul></td></tr></tbody></table>


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