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.
When I ask entrepreneurs and small business owners, it is not unusual for not having any marketing plan. I once read that Sir Richard Branson never had any marketing plan when he started the 1st Virgin business many years ago. In fact in one study of entrepreneurship (I couldn't recall the name of the study) was that as much as 50% of entrepreneurs and business owners don't have a business plan and marketing plan when they first started the business.