Ideally all products should be tested, but you will need a certain number of answers to have reliable results. For one product 100 answers are needed, that means for a survey of 50 products it’s necessary to have 300 respondents (each person answers to an average of 15 products).
If you are a company with a strong historical brand engagement that will be extremely easy. Therefore, our advice is to test the whole collection to have the maximum data to help your decision process.
If you test a new marke with no brand awareness or if you have created a new brand, the survey creation can be more challenging. In this case, our advice is to begin to work on your strategic product categories and to use the crowd design functionalities. This first survey will permit you to understand your prospects’ preferences and to prepare future surveys more adapted to your client pool.