Many people and companies confuse engagement management with higher maturity project management. EM is not about dealing with the static complexity of components being developed but with the dynamic complexity of linkages and relationships with the customer.
Or, as supported by Darwin’s theory a lot of features within an engagement have come about not to support survival, but to aid in courtship of the engagement. Since any engagement involves two parties, the impulse for self-improvement, that creates economic growth, comes from the need to be more attractive to the opposite sex than your rivals. No wonder that in any engagement the focus is on networking, relationship building, soft skills and cultural alignment. This does not mean that the science of project management does not play any role; it is a critical piece which done well every time adds points into the shared emotional bank leading to that all important and fundamental aspect of building trust.