It seems to have been put there to fill the need to attribute a certain sum to marketing. Make sure you are researching each point of your budget, make sure that you are giving it context and it makes proper sense within your overall plan.
Whether it is travel, study, cooking or any other activity involving a process, planning is usually the first step. The same holds true for business. Business plans are probably more important than the business itself. For example, the plan for a house is more important than the house itself, though it is the house that people remember and not the plan. But the house wouldn't stand without the plan, would it?.
Production/ Operation plan: The production/ Operation plan should include strategies for the following parameters ; Location and reasons for selecting the location ; Physical layout ; Cost and availability of machinery, equipments, raw material ; List of suppliers and, if possible, distributors ; Cost of manufacturing ; Quality management ; Production scheduling, capacity management and inventory management ; Changes in above in the case of expansion of business.
It could be, for example, the risk of a change in the economic environment - what are your contingency plans for that in terms of dealing with such a situation? There may be many other risks as well specific to your particular sphere of operation, but that ability to plan ahead for all scenarios makes for a robust business plan.