This is because the auditor's primary objective is to evaluate the adequacy and performance of the business continuity plan (BCP) in ensuring the continuity and resilience of the organization's critical functions and processesduring a disruption. The auditor should review the actual results and outcomes of the business response, such as the recovery time, recovery point, service level, customer satisfaction, and incident management, and compare them with the predefined objectives and criteria of the BCP. The auditor should also identify and analyze any gaps, issues, or lessons learned from the business response, and provide recommendations for improvement12.
Answer A. Confirm the BCP has been recently updated. is not the best answer, because it is not directly related to the auditor's course of action. Confirming the BCP has been recently updated is a part of the audit planning and scoping process, not the audit execution or reporting process. The auditor should confirm the BCP has been recently updated before conducting the audit, not after revealing that a simulation test has not been performed. Moreover, confirming the BCP has been recently updated does not provide sufficient evidence of the effectiveness of the business response12.
Answer C. Raise an audit issue for the lack of simulated testing. is not the best answer, because it is not relevant to the auditor's course of action. Raising an audit issue for the lack of simulated testing is a part of the audit reporting and follow-up process, not the audit execution or evaluation process. The auditor should raise an audit issue for the lack of simulated testing after reviewing the effectiveness of the business response, not before or instead of doing so. Furthermore, raising an audit issue for the lack of simulated testing does not address the root cause or impact of the problem, nor does it provide any constructive feedback or guidance for improvement12.
Answer D. Interview staff members to obtain commentary on the BCP's effectiveness. is not the best answer, because it is not sufficient to guide the auditor's course of action. Interviewing staff members to obtain commentary on the BCP's effectiveness is a part of the audit evidence collection and analysis process, not the audit evaluation or conclusion process. The auditor should interview staff members to obtain commentary on the BCP's effectiveness as one of the sources of information, not as the only or main source of information. Additionally, interviewing staff members to obtain commentary on the BCP's effectiveness may be subjective, biased, or incomplete, and may not reflect the actual performance or outcomes of the business response12.
References:
Business Continuity Management Audit/Assurance Program
Business Continuity Plan Testing: Types and Best Practices

A post-incident review (PIR) is a process to review the incident information from occurrence to closure and to identify potential findings and recommendations for improvement1. The most important reason for an IS auditor to examine the results of a PIR is to evaluate the effectiveness of continuous improvement efforts and to ensure that the lessons learned from the incident are implemented and followed up2. A PIR can help an organization to eliminate or reduce the risk of the incident to re-occur, improve the initial incident detection time, identify improvements needed to diagnose and repair the incident, and update the incident management best practices1. Therefore, a PIR is a valuable source of information for an IS auditor to assess the maturity and performance of the organization's incident management process.

A three-way match is a process of verifying that a purchase order, a goods receipt and an invoice are consistent before making a payment1. A three-way match ensures that the organization only pays for the goods or services that it ordered and received, and that the prices and quantities are accurate. A three-way match can prevent errors, fraud and overpayments in the accounts payable process.
An IS auditor should use a purchase order when verifying a three-way match has occurred in an enterprise resource planning (ERP) system. A purchase order is a document that authorizes a purchase transaction and specifies the items, quantities, prices and terms of the order2. A purchase order is the first document in the three-way match process, and it serves as the basis for comparing the goods receipt and the invoice. An IS auditor can use a purchase order to check if the ERP system has correctly recorded, matched and approved the three documents before making a payment.
The other options are not as useful for verifying a three-way match. A bank confirmation is a document that verifies the balance and activity of a bank account3. A bank confirmation can be used to confirm that a payment has been made or received, but it does not provide information about the details of the purchase transaction or the three-way match process. A goods delivery notification is a document that informs the buyer that the goods have been shipped or delivered by the seller4. A goods delivery notification can be used to track the status of the delivery, but it does not provide information about the quantity or quality of the goods or the invoice amount. A purchase requisition is a document that requests authorization to purchase goods or services from a specific supplier2. A purchase requisition can be used to initiate the purchasing process, but it does not provide information about the actual purchase order, goods receipt or invoice.
References:
Bank Confirmation - Overview, How It Works, Importance3
What is Goods Delivery Note? | Definition & Example4
What Is Three-Way Matching & Why Is It Important? | NetSuite1
Enterprise Resource Planning (ERP) - Definition, Types, Uses2

An IS auditor would be most concerned if process ownership has not been established for the information asset management process, as this would indicate a lack of accountability, responsibility, and authority for managing the assets throughout their lifecycle. The process owner should also ensure that the process is aligned with the organization's objectives, policies, and standards. The process should require specifying the physical locations of assets, include asset review, and identify asset value, but these are less critical than establishing process ownership. References: CISA Review Manual (Digital Version), Chapter 3, Section 3.3

Source code for the software must be placed in escrow is the most important requirement to include in the vendor contract to ensure continuity. Source code is the original code of a software program that can be modified or enhanced by programmers. Placing source code in escrow means depositing it with a trusted third party who can release it to the customer under certain conditions, such as vendor bankruptcy, breach of contract, or failure to provide support. This can help to ensure continuity of the software product and its maintenance in case of vendor unavailability or dispute. The other options are less important requirements to include in the vendor contract, as they may involve support availability, disaster recovery plan, or staff training. References:
* CISA Review Manual (Digital Version), Chapter 5, Section 5.51
* CISA Review Questions, Answers & Explanations Database, Question ID 228