An organization may rely on third-party vendors to provide some of its IT systems, applications, or services, such as cloud computing, software development, or data processing. The organization should evaluate the control environment of the third-party vendors, which is the set of policies, procedures, and practices that establish the tone and culture of the vendor’s risk management and control activities. The best way to evaluate the control environment of several third-party vendors is to obtain independent control reports from high-risk vendors. Independent control reports are the documents that attest to the design, implementation, and effectiveness of the vendor’s controls, based on the standards or frameworks that are relevant and applicable for the vendor’s services, such as the ISAE 3402 or the SOC 2. Independent control reports are prepared by independent and qualified auditors, who provide an objective and reliable assessment of the vendor’s controls. High-risk vendors are the vendors that pose the highest level of risk to the organization, such as by having access to sensitive or confidential data, or by providing critical or complex services. By obtaining independent control reports from high-risk vendors, the organization can verify that the vendor’s controls are adequate and appropriate for the organization’s needs, and that the vendor complies with the contractual and regulatory requirements. The other options are not as good as obtaining independent control reports from high-risk vendors, as they may not provide sufficient or consistent information or evidence on the vendor’s control environment:
Review vendors’ internal risk assessments covering key risk and controls means that the organization examines the vendor’s own evaluation of its risks and controls, such as by reviewing the vendor’s risk register, risk matrix, or risk report. This may provide some information or insight on the vendor’s control environment, but it may not be as reliable or objective as obtaining independent control reports, as the vendor’s internal risk assessments may have biases, conflicts, or gaps in their methodology, scope, or quality.
Review vendors performance metrics on quality and delivery of processes means that the organization measures and monitors the vendor’s performance and outcomes, such as by using key performance indicators (KPIs), service level agreements (SLAs), or customer satisfaction surveys. This may provide some information or feedback on the vendor’s control environment, but it may not be as comprehensive or relevant as obtaining independent control reports, as the vendor’s performance metrics may not cover all the aspects or components of the vendor’s controls, or may not reflect the latest or updated status or results of the vendor’s controls.
Obtain vendor references from third parties means that the organization collects and verifies the testimonials or recommendations of the vendor’s services from other customers or stakeholders, such as by contacting them directly or by reading their reviews or ratings. This may provide some information or evidence on the vendor’s control environment, but it may not be as accurate or consistent as obtaining independent control reports, as the vendor’s references from third parties may have biases, conflicts, or variations in their expectations, experiences, or opinions of the vendor’s services. References = Risk and Information Systems Control Study Manual, 7th Edition, Chapter 4, Section 4.1.2.1, pp. 147-148.
