The first step in managing stakeholder disagreement, especially regarding the use of new tools, is to investigate the reasons behind the disagreement. This involves understanding the perspectives and concerns of the stakeholders, which can reveal the underlying issues that need to be addressed. Seeking to understand before being understood is a principle that aligns with the PMBOKGuide's emphasis on stakeholder engagement as a key aspect of project management. By identifying the gaps and concerns, the project manager can work towards building consensus and finding a solution that aligns with the project's objectives and the stakeholders' needs. References: Overcoming Stakeholder Resistance Through Dialogue1, PMBOK Guide - Sixth Edition.