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.
Evaluating and Reviewing the Plan: Decide a time_frame for your marketing plan and determine the metrics on which you will measure its success. Measure the results it produces and compare them with the expected success. This will help to know whether any corrections or modifications are required to make the plan more successful.