The CMMC Code of Professional Conduct (CoPC) mandates that all certified professionals maintain objectivity and impartiality. Alex's behavior suggests a potential cognitive bias (e.g., confirmation bias) stemming from a past negative experience, which compromises the integrity of the assessment. The C3PAO, as the accredited organization, has an overarching responsibility to ensure the quality and objectivity of its assessments. This requires implementing a systemic program to proactively identify, manage, and mitigate potential assessor biases through training, internal policies, and oversight. Relying solely on a Lead Assessor to reactively manage bias during an assessment is insufficient; prevention is a key organizational responsibility.

A. Avoid working with assessors who have previous experience with the OSC

This is an overly broad and impractical policy that fails to distinguish between unbiased professional experience and a conflict of interest or bias.

B. Rely on the Lead Assessor to mitigate any potential bias

This is a reactive measure. The question asks for preventive steps, which are an organizational responsibility of the C3PAO, not just a real-time task for the Lead Assessor.

C. Undergo additional training in the CMMC requirements

The issue described is not a lack of technical knowledge regarding CMMC practices but a behavioral problem related to professional judgment and objectivity.

1. The Cyber AB, CMMC Code of Professional Conduct (CoPC) Version 1.1, November 2021.

Canon 2, Section 2.2: "Maintain objectivity and impartiality in all professional activities. Avoid any activity that creates or gives the appearance of a conflict of interest." This canon directly establishes the professional obligation to manage bias.

2. ISO/IEC 17021-1:2015, Conformity assessment — Requirements for bodies providing audit and certification of management systems — Part 1: Requirements. (The foundational standard for C3PAO accreditation).

Section 5.2, "Managing impartiality": This section requires certification bodies (like C3PAOs) to identify risks to their impartiality on an ongoing basis. It states, "The certification body shall have a process to identify, analyze, evaluate, treat, monitor, and document the risks related to conflict of interests...arising from provision of certification including any conflicts arising from its relationships." This includes managing biases of its personnel.

3. Carnegie Mellon University, Software Engineering Institute, Diagnosing and Mitigating Cognitive Biases in Threat Analysis (CMU/SEI-2021-TR-003), April 2021.

Section 3.1, page 10: Discusses confirmation bias, where analysts "seek, interpret, and recall information that confirms their preexisting beliefs." This academic source explains the underlying psychological mechanism of Alex's behavior, reinforcing the need for formal processes to manage such biases in assessment and analysis environments. (DOI: https://doi.org/10.1184/R1/14478810.v1)