Who are the best people to write survey questions for industry like Retail? Or any industry in general? Points to remember while creating survey?

If a survey is conducted for the public, the first contributor to consider is the customer. What attributes are they looking for, what makes them take the decision to buy or not to buy. First line employees are a good source of information. Second would be in my opinion, your complaints and ideas box. Complaints received give a good indication of what you need to ask about. Then anything and everything that contributes to the quality and reputation of the product needs to be factored in the survey one way or another.