I have heard a couple of people expressing concerns about the surveys we have to make for the PDP subject.
Well, there is much easier solution to distribute the questionnaire and analyze the data. Instead of printing out a bunch of copies and running after your friends and family, set up an electronic questionnaire on
www.zoomerang.com or
www.surveymonkey.com. You can make a 30-questions survey for free on Zoomerang, which I used for my bachelor thesis.
Then you just send a link to your population, they fill it out whenever they have time, and everybody is happy. Especially you, because Zoomerang analyzes the data for you.
If any questions, please, ask.