Check out the lower right corner of post #673513.
It's one of those cross-connected line charts used for some kind of decision making that crops up occasionally in Japanese works.
There's an entire Pixiv tag that makes use of this device:
http://www.pixiv.net/tags.php?tag=髪色×髪型×10人
Unfortunately, the tag name just means "Hair color x hair style x 10 people," so no help there.
What the heck is that thing called?
Updated