If you want to use your plan to seek millions of dollars in seed capital to start a risky venture, you may have to do a lot of explaining and convincing.
If you're just going to use your plan for internal purposes to manage an ongoing business, a much more abbreviated version should be fine.
Generally, in a business plan, you want to "put your best foot forward".
So if, for instance, you have a stellar group of people serving on your new business's advisory board, by all means, put that section directly after the Executive Summary.
You want every aspect of your business plan to impress (especially if you're using it to ask for money).
A business plan is a written description of your business's future.
Beyond that, it's logical to have all the material relating to markets (the Industry Overview, the Marketing Analysis, the Competitive Analysis and the Marketing Plan) together.
However, there's no reason why the Management Plan section couldn't directly follow the Executive Summary, for instance, if you want to play with the order.
It summarizes the key elements of the entire business plan and is the first thing anyone looking at your business plan reads so it's critical that your executive summary is outstanding.
(Reading this Executive Summary Example will give you a sense of how to put yours together.) An overview of the industry sector that your business will be a part of, including industry trends, major players in the industry, and estimated industry sales.