As shared in the introduction article, when we refer to the science of project management we mean the different techniques and methodologies taught in formal project management education. There are quite some different programs out there, all with their pros and cons. The main differentiator is between those that originated from an Agile mindset and those that originated from a more waterfall approach, which later incorporated Agile principles as well.

The way I perceive the science of project management is that it provides a solid foundation for setting up and executing projects. I know of few projects that are successful without a proper level of project science being applied. It serves a good purpose within the practical management of a project. It helps to define a structure and approach for projects as well as providing input for the actual day-to-day management.

Through the methodologies a common project vocabulary is created. The framework it provides ensures perceptions and project definitions typically are fairly well aligned. In that sense these methodologies play an important role in the creation of clarity, one of the more important tasks of any PM. It also allows for efficiency in project execution.

However, it is not all good news with these PM methodologies. Just imagine the evolution of any methodology over time. Refinements are made to accommodate for recent experiences. In the case of project management methodologies, the context they have evolved in is one where project success often was lacking. So methodologies got more extensive, more refined to "fix" the issues, and as a result the emphasis on the methodology has grown. The application of the methodology has become a goal rather than it being an important tool to achieve success.

Just have a look at the majority of the PM methodologies and the sheer amount of information is a hindrance to successfully executing any project. It distracts, creates complexity, and prohibits clarity rather than helping provide it. Any project of significant size is complex. As a result a simple approach is required to be able to achieve success. Projects cannot afford to be distracted by the complexity of the supporting methodology.

Over time, the management of a project has become overly technical and clinical. Where the actual success is to be made together with people, cooperating and guiding them towards achieving project goals. An ever-growing imbalance in the focus on people versus the focus on methodology is what the project management industry is facing.

To summarize: project management methodologies are important to generate a minimal level of success within projects. None of these methodologies however provide a complete toolbox for your project success, as they are lacking the focus on the people element within projects.