Commercial DD – Customer interviews This topic has 0 replies, 1 voice, and was last updated 3 years, 6 months ago by Sebastien Perroud. Viewing 1 post (of 1 total) Author Posts February 14, 2021 at 4:59 pm #36158 Sebastien PerroudMember How many customers to interview to get a good overview in a commercial DD? Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In