Caroline Jarrett presents the Question Protocol to introduce a process to wean out unneccessary survey questions:

A question protocol is a tool for finding out which form fields are required and lists

• every question you ask

• who within your organization uses the answers to each question

• what they use them for

• whether an answer is required or optional

• if an answer is required, what happens if a user enters any old thing just to get through the form

The rest of the article can be found here.