When a mandatory compliance regulation is not implemented in a project, the project manager should take immediate action to ensure that the team implements the required compliance. This is crucial because compliance regulations are often non-negotiable and are required for legal and operational reasons.
Implementing the compliance will likely impact the project schedule and budget, but it is necessary to meet the mandatory requirements before the product can be released.
References: = The PMBOKGuide highlights the importance of adhering to compliance requirements and the project manager's responsibility to ensure that the project meets these requirements12. Additionally, the guide discusses the need for project managers to be proactive in managing compliance and the potential consequences of noncompliance34.

The project manager should invite the stakeholder to the regular "show and tell" sessions, also known as sprint reviews or demonstrations, where the team showcases the features that have been completed in the current iteration. This way, the stakeholder can be aware of the project progress, provide feedback, and validate the value and quality of the features. This can improve the communication and collaboration between the team and the stakeholder, and reduce the risk of deploying the wrong features. Assessing the stakeholder's needs and communication style and proposing a tailored approach may not be enough, as it does not address the issue of missing critical information about the features. Conducting stakeholder remapping and evaluating stakeholders by their level of influence and interest may not be necessary or effective, as it does not involve the stakeholder in the project delivery. Including the stakeholder on regular project communications may not be sufficient, as it does not provide the opportunity for the stakeholder to see and interact with the features. References:
* A Guide to the Project Management Body of Knowledge (PMBOKGuide) - Seventh Edition, Chapter
13: Stakeholder Engagement, Section 13.3: Manage Stakeholder Engagement, Section 13.4: Monitor Stakeholder Engagement
* Agile Practice Guide, Chapter 2: Life Cycle Selection, Section 2.3: Implementing Agile: Delivering in an Agile Environment
* Professional in Business Analysis (PMI-PBA)Handbook, Section 2.3: Domains and Tasks, Domain 4:
Analysis, Task 9: Validate Requirements
* Professional in Business Analysis (PMI-PBA)Examination Content Outline, Domain 4: Analysis, Task 9: Validate Requirements