The first step in addressing the contractor's failure to comply with the contractual commitments is to remind them of their obligations. This aligns with the best practices in project management, which emphasize communication and problem-solving as initial steps before escalating the issue or seeking legal recourse. It's important to address the issue directly with the contractor to understand their perspective and to work towards a mutually beneficial resolution. This approach is supported by the principles outlined in the PMBOK Guide, which advocate for proactive stakeholder engagement and communication management as essential components of project management.
References:
PMBOK Guide - Sixth Edition
PMP Examination Content Outline - June 20191
Professional in Business Analysis Reference Materials2