I was asked this by one of my colleagues in Poland. They really wanted to know precisely what format plan to use. The answer was: A plan that is used.
I was put on the spot, and as I scrambled for an answer it occurred to me that the best plans that I have written came in different formats. It didn’t matter if the plan was an eighty page document, a one page text description, a 100 line formally completed GANTT chart or a simple time-line on a PowerPoint slide with six milestones spread over 3 years, the plans that were the best were those which were successfully implemented. If my plans used the best tools but they were not implemented then they were not good plans.
So, don’t about the template, think about the practicality, and the ability of the “plan” to motivate a group of people to execute.