plan as you go Rolling wave planning lets you plan as you go Sometimes you start a project without knowing a lot about the work that you'll be doing later. Rolling wave planning lets you plan and schedule only the stuff that you know enough about to plan well. If Kathleen were using rolling wave planning, she might write a schedule for only the tasks it takes to do the invitations and leave the planning for the menu and the seating up in the air until she knows who will RSVP. Rob and Rebecca probably wouldn't be happy hearing that Kathleen was only going to plan for the invitations to be sent, though. They want to know that their wedding is going to happen on time. That's why rolling wave planning should only be used in cases where it's not possible to plan any other way.