Humans have been working on figuring out how to better manage projects since the beginning of time. Globalization and increasing competition forces us to always be on the lookout for methods to get to market faster while simultaneously increasing employee engagement, reducing costs, and delighting our customers.
Fifty years ago, the Project Management Institute (PMI)® established the first-ever Project Management Body of Knowledge (PMBOK), giving us a standard for successfully managing projects which, the first time, established a comprehensive, logical flow of processes that Project Managers would generally have to complete in a project and provided recommendations on how to complete them using all the leading leadership and management theories of the time; giving us a common language to manage projects at scale across the enterprise and a globally-recognized certification to indicate our demonstrated knowledge and expertise in the application of this standard.
Over time, we have developed frustration with this standard and developed and learned new ways of working, like "Agile" and "Lean" mindsets. And over time, we have developed tens of methodologies that compete for attention as THE Agile or Lean approach that is best to use in any situation, such as Lean Six Sigma, SCRUM,