How to develop investing framework?

Hi everyone,

I had a question regarding how you think about the framework for investing in a stock.

I am partly asking because I interviewed at a place and basically said something more along the lines of ‘look at drivers behind the business and do a blended valuation using a DCF’ etc and the interviewer almost seemed pissed off. Now, thats the way in my former sell-side job we did it, and I wasnt sure how to think about this.

I was wondering if any one here, who has experience working on the buy-side (especially long only), can help me offer some advice on how they approach it in real life.