The project manager should determine the communication needs, environment, and tools to get the message across to the remote development team. This is part of the Plan Communications Management process, which involves identifying and documenting the approach to communicate most effectively and efficiently with stakeholders1. Evaluating and reassigning the developing tasks to a local vendor who has worked on previous projects (A) is not a viable option since it would disrupt the project schedule, budget, and scope. Documenting the risk in the risk management plan and using contingency reserves to hire a local vendor (B) is also not appropriate since the communication issue is not a risk but a problem that needs to be resolved. Reviewing lessons learned from previous projects and organizational process assets (OPAs) is a good practice, but it is not sufficient to address the current situation. References:
* 1: A Guide to the Project Management Body of Knowledge (PMBOKGuide) - Seventh Edition, Chapter 10, Section 10.1.3.1

According to the PMBOKGuide, effective communication is crucial for project success. The project manager should ensure timely and appropriate generation, collection, dissemination, storage, and ultimate disposition of project information. This includes direct communication with stakeholders about any changes or delays in the project schedule. By communicating directly, the project manager can manage stakeholders' expectations and maintain trust12. References: = Project Communications Management According to the PMBOK1; Project communication-foundation for project success2.

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.
:
PMBOKGuide - Sixth Edition
PMP Examination Content Outline - June 20191
Professional in Business Analysis Reference Materials2

When faced with a major process change in HR acquisition, especially one that implies longer processing times, it is essential for the project manager to first assess the impact of this change on the project's objectives and deliverables. By reviewing the project management plan, the project manager can determine the appropriate adjustments to the project schedule, resources, and strategies to mitigate any negative effects on the project's timeline and costs. This proactive approach aligns with the principles of effective project management, which include flexibility and responsiveness to changes within the project environment.
: = The PMBOK guide emphasizes the importance of continuously monitoring and controlling project work to address changes and implement necessary adjustments1. Additionally, the role of HR in managing changes during mergers and acquisitions, as outlined in professional business analysis resources, supports the approach of assessing impacts and planning accordingly234.