I'm not a fan of charts... I by far prefer shooting perpendicular a flat target (like 3 similar boxes staggered)
A quick and dirty (but still better than most charts) method uses 3 staggered batteries, you aim for the middle one. This is one of the test I do with a lens when evaluating it in a store.
This is from my Tamron 17-50 (which needed -10 adjustment on my K20d but front focuses more than what I can adjust on my K5 and is unusable under F4 so it will be sent for service after the holidays)
This is with no adjustment on the K5:
This with -10 adjustment, better but it still front focuses:
I move the battery on the right to see where the real focus point is:
Be sure to evaluate your body with other lenses first by the way... you want to make sure that it's that lens thats front focusing and not the camera body. In my case my K5d is dead on with my other lenses.
Pat