PMP Practice: Evaluate engagement needs for stakeholders

Sky Volkov is managing a manufacturing automation project for Hygge Analytics. The project charter identifies two key stakeholders: the Cedar Okonkwo, who prioritizes rapid deployment to meet the holiday shipping season deadline, and the Quality Assurance Manager, who insists on extended testing protocols to prevent equipment failures. With 12 weeks until the deadline, the QA Manager requests an additional 4-week testing phase that would push delivery past the critical date. The Cedar Okonkwo sends Sky an email stating that any delay is unacceptable and threatens to escalate to the executive sponsor. Both stakeholders have legitimate concerns supported by organizational policies. What should Sky do to best address this conflict?