Ask HN: Have You Defined a Minimum Brand Strategy?

The startup I work for/we need to define our personas and value propositions for each persona.

I am looking for a framework, or some guidelines, to help us define personas and value propositions.

I found this article: "Start-Ups Need a Minimum Viable Brand" written by someone with, what it seems looking at the article she wrote, a corporate background.

https://hbr.org/2014/06/start-ups-need-a-minimum-viable-brand