"A goal without a plan is just a wish" ~Antoine de Saint-Exupery. "Expect the best, plan for the worst, and prepare to be surprised." ~Denis Waitley "A good plan today is better than a perfect plan tomorrow." ~Proverb My last blog post, PBL project design: How to plan projects that work, part 2. I wrote that creating a project timeline made up of milestone events is essential in keeping the project moving forward. A PBL timeline should contain the following milestone events.