From publisher blurb:
This design kit is not a replacement for the character creation rules in 4th edition. It doesn’t tell you how to set ability scores, for instance, or explain race and class features. What it does do, however, is assemble templates of the statistics that change with rising character level and does most of the math for you!
Instead of creating a 1st-level character and then adding the level upgrades until you reach the desired level, you can simply grab a template and follow the guidelines to create a character at the level you need -- making the process much faster for GMs and players alike.