If an online business, you need to go into detail how you will attract customers to your website. General statements like "I will use Face Book ads and email marketing" will contribute almost nothing to helping your cause unless you have detailed statistical analysis of tests you have conducted or of another similar business you have been associated with. If you do not have any data upon which you reference your estimates, it could show lack of proper thought to the remainder of your business plan.
For an online business, a detailed and in depth business plan is usually not necessary unless you are trying to combine your online business with a traditional business. For most online business startups, the detail involved with planning a traditional business is not required. However, it would still be beneficial to you if most of the topics were still covered, even if only briefly. Having a written plan in front of you will help you to focus on important aspects of the business.
The risk management plan needs to be fleshed out in the organizational section as well, including your risk strategy, the different types of insurance required, your contingency plans, and problem_solving protocols. What will you do if a natural disaster ruins part of your inventory? How will you handle the sudden illness or long_term absence of a key manager? What happens if you are unable to finish a project on schedule? What are some early warning signs to watch for?