Measure the right things

“Start young” we’re all told. It’s impor­tant to invest over a life-time to build wealth.

I came across a great few lines in this short arti­cle:

The con­sis­tent appli­ca­tion of a good invest­ing process takes slight edges and com­pounds them over time.

I have just one sim­ple ques­tion.

If ‘time’ is so impor­tant (and I agree that it is), then why aren’t there more met­rics that are com­mon­ly used that incor­po­rate time into invest­ment ana­lyt­ics?