Sales and Strategy Forecast: If you have a target to achieve you can plan out your work according. It's just like keep the figures real and amenable. Unrealistic figures would not help you ever to get the target on time. Secondly with these forecast, you can compare your marketing strategies and come up with the best solutions for future activities.
The marketing plan that has a feedback cycle, from 8th stage back to the 4th. That is because sometimes during the planning process, we might need to perform stages 4 to 8 several times before the final plan can be written.