Boost Items in Game Dev Story

The boost items act fairly similarly to when one of your employees asks you if they can attempt to improve the current game. You spend the research points that it tells you (you can't increase the amount of points you spend) and the game allows you to select which employee should use the boost. However, the main difference is that the boost doesn't fail. I'd if you have a project that's looking good, use the boost items as many times as your research points allow to patch of the weak points.

One thing to note - the items don't disappear after you use them.

Certain classes are better at certain boosts. If you do a little trial and error, this will leap out at you. Generally you get about 15 points per boost, but if you boost with the "best" class, it'll go into the 20's.

Edit: Producers are the best to boost "Creativity"
Directors are the best to boost "Fun"
Hackers do well at Graphics and Sound, but Designers and Sound Eng do better.