The managerial function described here is Planning.
Planning involves setting business objectives and deciding the course of action to achieve them. An entrepreneur uses a business plan to determine what tasks need to be done, when and how they will be executed, and who will be responsible for each task. It acts as a roadmap for the business.
The question describes the classic definition of the planning function of management. Examiners expect you to:
Do not confuse this with organising (which deals with arranging resources). The business plan is the tool of planning. Stick to 2–3 sentences since it is a 2-mark question.