We understand today that project management is the ability to manage knowledge, skills and techniques needed to complete a project. 

The Project Management Institute (PMI) defines project management as the understanding of planning, the purpose, the timeline and the budget needed to complete a project all the while getting the work done as the project moves forward.

Additionally Project Management Managers also have a uniqueness about them because they understand the science and art in dealing with scheduling and estimating as well as building a consensus among management all the while dealing with conflict.