The general process for Unit-e Improvement Proposals (UIP) is defined in UIP-1. This describes how a UIP looks like and how it goes through the stages of its life cycle. Please read that document as a starting point when you intend to create a new UIP or become involved in any other way.
For creating new UIPs there is a template. You can start from
that by forking the dtr-org/uips
repo, copying the template,
filling it out, and submitting your proposal as a pull request.
Feedback and discussion on existing proposals is also welcome. Use the comments in pull requests to provide your input.
Let's improve Unit-e together.