You have to include multiple perspectives. Make a list of the top 5 features... - you think your customers need - your customers want (ask them!) - which off

You have to include multiple perspectives. Make a list of the top 5 features... - you think your customers need - your customers want (ask them!) - which offer the highest return on invest - your product needs when being compared with your competitors When you have answered those questions, you should have a good feeling about which features you want to implement first. Next, ask the devs how your priorities match up with the development of the application and how much time it would take to build them. Some features might technically depend on each other. Edit: Btw. changing priorities is okay, as long as nobody has started to work on a feature. As soon as the implementation started you better finish it. Make sure your business team commits to the things you start implementing and get the commitment from the dev team to finish things in time.