using differential analysis for sucsess in personal development

[BjarkeT]

the title says it all differential analysis seems to be an interesting tool to figure out what matters for success  

it could, for example, help you making a project successful for example if you want to lose weight you could find somebody who already was in a similar situation as you but has already accomplished the goal and then find someone else to compare it to who also was in a similar situation but wasn't as successful and then figure out what the key was to success(should be the diffrence between the two likely if it seems to be the same case with more examples) and then create a project afterward where the chance is likely to be more successful as you know the key to success if you did it right