According to the IIA guidance, the most appropriate next step when discovering a sales manager approving contracts beyond their authorization limit is to communicate the finding to the supervisor of the sales manager through an interim report. This approach ensures that the issue is addressed promptly and management can take immediate corrective actions to prevent further unauthorized activities. Including new contracts under negotiation in the final report would delay action, while reminding the sales manager of their authority limits does not escalate the issue appropriately.
IIA Standards: 2440 - Disseminating Results
IIA Practice Guide: Communicating Audit Results

The chief audit executive (CAE) should prioritize risks to be used for the audit plan. Although the CAE is not accountable for managing risks, he is responsible for ensuring that the internal audit activity provides assurance on the effectiveness of the risk management processes. The CAE must understand the organization's risk landscape and determine which areas require audit attention based on their significance and potential impact. References: IIA Standard 2010 - Planning, IIA Practice Guide - Coordinating Risk Management and Assurance

Best practices for engagement planning involve setting objectives that align with the business objectives of the audit client. This ensures that the audit is relevant and provides valuable insights to the organization.
Planning should also be systematic and documented, ensuring that specific testing procedures and expected outcomes are outlined and communicated. References: = IIA Standard 2200 - Engagement Planning and IIA Practice Guide: "Planning the Engagement".

Professional skepticism is an essential attitude for internal auditors, particularly when assessing the risk of fraud. According to the IIA's Practice Guide "Internal Auditing and Fraud", one of the red flags that may heighten an internal auditor's professional skepticism is the presence of employees whose qualifications or credentials do not match the requirements of their positions. In this case, a procurement manager lacking the expected academic credentials raises concerns because it could indicate potential fraudulent activities such as unqualified decision-making or manipulation of procurement processes.
Reference: IIA Practice Guide "Internal Auditing and Fraud"

Control Self-Assessment (CSA) is a process through which employees at various levels of an organization can participate in assessing the effectiveness of risk management and control processes. The direct benefits of CSA include allowing process owners to identify, evaluate, and recommend improvements for control deficiencies (Option B), improving the control environment (Option C), and increasing control consciousness (Option D). However, allowing management to have input into the audit plan (Option A) is not a direct benefit of CSA. This involvement is more related to audit planning and risk assessment rather than the CSA process itself. References:
* The IIA's Practice Guide on Control Self-Assessment.