"Never delegate understanding," insisted Charles T. Munger, Vice Chairman of Berkshire Hathaway, emphasizing the need for leaders to possess comprehensive grasp of their domains. As such, undertaking a Project Management Professional (PMP) certification is no different. It requires an in-depth understanding of project management processes, terms, and methodologies.

But the investment is worthwhile. Adequately managed projects translate to Risk Management, Cost Reduction, and Process Improvement, hence it's crucial for Fortune 500 C-level executives to appreciate this inherent value.

A key principle of PMP that directly aligns with Fortune 500 C-level strategic goals is Effective Stakeholder Engagement. This involves identifying, analyzing, and actively managing relationships with individuals who affect or are affected by the project. Effective stakeholder engagement is mapped into the Strategic Planning process and is vital for a successful project execution, as it enables faster decision making, decreases resistance to change, and ensures project benefits are realized. The application of this principle can transform stakeholder relationships from transactional to strategic, providing a competitive edge.

PMP-driven project management also enables the effectiveness of another crucial aspect—Digital Transformation. Companies are rapidly embracing cutting-edge digital technologies for attaining efficiency, yet, the rate of failure for Digital Transformation projects is still high. Much of this can be mitigated using the principles of PMP. Employing Project Management methodologies reduces failure risk by providing framework for consistent communication, effective management of project scope, and ensuring alignment with strategic business outcomes.

Another important principle from PMP is the Continuous Monitoring and Control activities, which overlaps with the idea of Performance Management. PMP methodologies necessitate constant monitoring, reporting, and correcting of project performance to ensure that final results meet the defined objectives. For C-level executives, embodying this principle helps in making data-driven decisions, predicting future trends, and ensuring projects are on track to deliver value.

PMP principles preach Operational Excellence, an oft-ignored area in organizations. Executives endorsing PMP methodology pursue continuous improvement, reducing waste, and streamlining operations to create the highest level of efficiency within an organization. This practice not just enhances product quality and customer service, but also increases the efficiency of resource use, thus propelling the company towards sustained growth and profitability.

Furthermore, the strategy of Risk Management is elemental in PMP. As a preventative action, it plays a significant role in decision-making processes and project planning. It guides in identifying potential risks, analyzing their ramifications, devising precautions, and thus, saving the organization from catastrophic failures. Consequently, understanding and applying Risk Management can lead to more informed and therefore better decisions.

Overall, the incorporation of PMP methodologies and principles into management strategy provides unmatched value to organizations. Leaders who appreciate and actively work to understand these principles will drive Operational Excellence, Performance Management, and Risk Management, among other hierarchical organizational benefits, putting their efforts within the Strategic Planning process to the best use. To echo Charles T. Munger—understanding PMP is not to be delegated, but rather, to be comprehended and governed by the executives themselves.