Dr. Anya Sharma is leading an ISO 10005:2018 audit for \"Project Phoenix,\" a large-scale infrastructure project. During the audit, the team identifies a significant non-conformity in the Engineering Department\'s quality planning documentation, specifically related to inadequate risk assessment for critical design elements. The Engineering Department, led by Chief Engineer Kenji Tanaka, vehemently disagrees with the finding, arguing that their existing processes, while not fully documented according to the new standard, are robust and have consistently delivered successful outcomes in the past. Tanaka expresses concerns that implementing the required documentation changes will significantly delay the project and increase costs without adding tangible value. The audit team has already documented the non-conformity in the preliminary audit report. Considering the principles of stakeholder engagement, risk-based thinking, and communication outlined in ISO 10005:2018 and ISO 19011, what is the MOST appropriate next step for Dr. Sharma and her audit team?