a mix of the following works for me: 1. resources (time) required to get mvp together to test assumptions 2. amount of long-term work needed to get foothold i

a mix of the following works for me: 1. resources (time) required to get mvp together to test assumptions 2. amount of long-term work needed to get foothold in market 3. total size of market vs costs over growth -> projections 4. if you fail, what have you lost? sunk costs vs variable ones.. redeemable experience at the end..? 5. most importantly, which actually interests you more?