For an organization that allows the same individuals to access physical inventory and purchase new assets, conducting a periodic inventory count and reconciling inventory movements is the best way to manage the risk of fraud. This approach ensures that inventory records are accurate and allows discrepancies to be identified and investigated promptly, thereby providing a check against fraudulent activities or errors. References: Best practices in internal control procedures for inventory management, as recommended by the Institute of Internal Auditors (IIA).

If there are unresolved scope restrictions, the chief audit executive (CAE) should consider whether to pursue the audit and note the scope restrictions in the audit report. This is important because scope restrictions can limit the audit's ability to fully assess the control environment, and documenting these limitations helps ensure that the audit report reflects the extent to which the auditor was able to evaluate the control environment.References: The IIA's International Standards for the Professional Practice of Internal Auditing regarding scope limitations and reporting.

A risk register would be most useful for an internal auditor assessing the effectiveness of the organization's risk responses. This tool lists all identified risks along with their severity, ownership, and the actions taken to mitigate them, making it a key resource for evaluating whether the responses have been effective and align with the organization's risk appetite and management strategies.References: IIA guidance on risk assessment and management

According to the IIA's Code of Ethics and professional standards, internal auditors must maintain their independence and objectivity. However, they can provide training or advisory services as long as it does not impair these qualities. In this case, the internal auditor can accept the request to deliver training on the organization's third-party risk management process if she clearly defines the scope and ensures that it aligns with the principles of integrity, objectivity, confidentiality, and competency. This means the auditor should not take on management responsibilities and should ensure that the training is within the boundaries of providing advice and guidance without making decisions or taking actions on behalf of management.
References:
* IIA Code of Ethics
* IIA Standard 1130: Impairment to Independence or Objectivity

The IIA's mission for internal audit emphasizes the role of internal audit in enhancing and protecting organizational value by providing risk-based and objective assurance, advice, and insight. Assessing the effectiveness of internal controls over organizational assets directly aligns with this mission as it focuses on providing assurance on the control environment and operational effectiveness, which are crucial for protecting assets and ensuring reliable financial reporting and compliance.References: The Institute of Internal Auditors (IIA) - Mission of Internal Audit