I used to do a bunch of these for Google. The high-level framework used to be:
1. Is this a market-making product (e.g. self-driving car) or an alternative in an existing market (e.g. fax is better than couriering a page).
2. If market-making, then focus a lot on adoption curve, regulation if any including safety studies etc, educating the market / publicity / PR, and finally pricing etc (you can practically set the price if you are a market-maker).
2A: The most difficult part here is predicting the adoption curve and for that you need to use "comparables". What was the adoption rate for the flying airborne zeppelin? It was the very first time any commercial "airline" was operating. The adoption was hard to gauge because people have to give up control of their lives. Turns out the adoption for this was similar to adoption for vaccines!
3. If a Market-Alternative, then things get easier. You need to focus on a couple of things to beat the alternatives: (1) price (if a commodity / service) and (2) product differentiation (e.g. fax is faster than courier but downside is there is was no guarantee it was received / read etc.).
3A. Once you've figured out that you have to either pick your battle on price or product differentiation, then you start focusing on the adoption curve (similar to an alternative usually but use your judgment -- radio vs tv, usually latter tech gets adopted much faster.. also landline vs cellphone).
3B. Having picked a reasonable adoption curve, you have a "payback period" which will help you figure out the right pricing based on initial R&D, mfg costs, and other expenses. If tech adoption will take 20yrs for example, you need to decide if you can price this high at the beginning (remember computers were WAY more expensive 20yrs ago). If you can NOT, then you will lose the market and should not manufacture.
Hope that gives you a good high-level framework.