When setting the scope for identifying and assessing key risks and controls in a process, developing the scope of the audit based on a bottom-up perspective is the least appropriate approach. A bottom-up perspective typically focuses on individual controls and processes without necessarily aligning with the organization's critical business objectives and risk appetite. Effective risk assessment should begin with a top-down approach, identifying key business objectives and the associated risks, and then determining the necessary controls to manage these risks. Reference: IIA Practice Guide - Auditing Key Risk Management, IIA Standard 2200 - Engagement Planning