Invest on quantitative financial numbers;disregard all other qualitative aspects

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http://www.grahamanddoddsville.net/wordp...chloss.pdf

See point 11 from walter schloss.
If want to care less about qualitative factors, buy in a way that is less dependant on earnings...

for #11, I have already considered this. I have Price/NAV as one of my valuation screens.

Especially so for REITs, financials and property counters

Honestly, I have disregarded price/NAV very often when PE is an attractive one.

Ok neat. How about earnings...have you considered using normalized earnings instead of trailing?

I guess another important question before determining the methodology might be to decide the amount of return that one expect from spending so much time on selecting stocks for investment? Like 8%,12%,15%,20%,25%, etc...

Presumably the amount of return could also influence the method(s) to use. There r LOTS of ways of choosing stocks for investment. Maybe you might want to go through all of them and find one or more that you think might be suitable, and experiment with it and if comfortable with it, take it up and then start to tweak it. Can understand this problem u r having as I personally have tried various approaches/combinations for around 13 years, like GARP, net net, asset play, high ROE, low P/B, high net cash, low PE, turnaround, change in business mix, etc.