What options are available to a project manager when there exists a disagreement between the sponsor and the project management?

The project manager should hold a meeting with the sponsor to speak about the importance of the project management by discussing the concepts of this field, how to achieve the project goals and objectives, and to follow PMI which is the best PM guidance

The Project Management Institute focuses on nine distinct areas requiring project manager knowledge and attention:

1. Project integration management to ensure that the various project elements are effectively coordinated.
2. Project scope management to ensure that all the work required (and only the required work) is included.
3. Project time management to provide an effective project schedule.
4. Project cost management to identify needed resources and maintain budget control.
5. Project quality management to ensure functional requirements are met.
6. Project human resource management to development and effectively employ project personnel.
7. Project communications management to ensure effective internal and external communications.
8. Project risk management to analyze and mitigate potential risks.
9. Project procurement management to obtain necessary resources from external sources.

Thanks for the invitation.

I agree with Rifat, and I would see what would the consultant or the court decision about this specific disagreement if it's up to them. 

At least one distinct person should be assigned to each role, and those individuals should have prior relevant experience in project management even if they are not assigned to delivery responsibility. #1. Executive Sponsor This stakeholder is the highest-level project management executive who is sponsoring the entire project initiative (usually, in the form of direct funding of the business case) in the organization that is implementing the project. Key responsibilities: Provides sponsorship and financial support Establishes a project funding model and approves sources of financing Governs change management and escalation processes. #2. Business Analyst A person obtaining this project sponsorship role is typically a senior business management professional with a slight technical background to understand in detail the entire value chain of the project delivery cycle and to determine the business needs for the project. In simple terms, Business Analyst looks at every activity that the project team deals with and helps in improving performance through data analysis. Key responsibilities: Analyzes and documents the value chain throughout the project Controls and analyzes the project delivery process Provides suggestions for improvements to the project plan Establishes and governs performance standards. #3. Technical Advisor This role involves the highest-level technical consulting and leadership to establish and support the technical infrastructure of the project in the performing organization. Technical Advisor makes strategic decisions regarding using, acquiring, and phasing out technology throughout the project life-cycle. Key responsibilities: Establishes a technology stack for the project Plans and evolves system capacity and architecture requirements Provide technical guidance and leadership Promotes and governs technology use and reuse. #4. Strategy Lead This role is typically taken by a full-time employee in the performing organization who organizes, articulates, and drives the agenda for project implementation activities. Strategy Lead works closely with the project manager to agree on the project scope and change management. This stakeholder has a full-time commitment to translating the chosen business strategy into action plans activities by means of project management and implementation. Key responsibilities: Determines and manages the strategic elements of the business case Prioritizes overall project pipeline Facilitates requirements development Establishes and governs methods and standards of project delivery and tracks project progress.