When determining the audit universe, the CAE should consider components of the organization's strategic plan (Option 1), inputs from senior management and the board (Option 2), and results of exit interviews with departing employees (Option 4). These factors provide a comprehensive understanding of the organization’s objectives, risks, and areas needing attention. Views of competitors and business associates (Option 3) are not typically a direct consideration for the audit universe, as the focus is primarily on internal factors and direct stakeholder inputs.

IIA Standard 2010: Planning.

IIA Practice Guide on Developing the Audit Plan.