Originally Posted by Colombo
I'm trying to figure out which questions are the best, so I'm going to develop a "Question Quality Score" (QQS).
Here is the key to us helping you with your problem. What do you mean by "which questions are the best?" Do you mean the questions that are the most difficult? Do you mean the questions that are the most discriminative (i.e., the questions that best identify differences in the test takers' true skill levels)?
Depending on your answer, you might look into item response theory.