Jackson Earnest was recently hired as the new CAE for Magellan Enterprises. Magellan has received clearance from the SEC to issue its shares to the public, and accordingly anticipates being a publicly traded company in the second quarter of next year. Jackson was advised by the which the quality of the work of the internal audit department may be assessed (include one internal methods and an external method. An internal audit team composed of four members plans to undertake an assurance engagement to evaluate the operations of the corporation's advertising department within the marketing operation. (The company is in the snack food business and is the largest US competitor of Pepsi Brands.) This department has never been audited before, but because it spends nearly $50 million on television ads, promotions at sporting events, and printed media, management would like it to be audited. Please discuss three matters the team might consider during the Planning stage of this engagement.