Interviews of individuals is not suited for medium to larger groups of people. It's not an effective use and if would take too long to gather the data. That being said, I've used many different techniques to help speed up my UX process and utilised methods that help retain flexibility. Here are just a few that you may already be using in your day to day UX role.
What is it? What kind of ROI does UX bring to a project? First off, If a designer is working on a sizable project and tells you that this is a process their designs do not need to go through and you believe them, then dear reader you have been hoodwinked. I'll explain why.