Project management as the term implies focuses on management of manpower, time, money, and materials involved in a project. It also needs knowledge, skills and experience in the field or industry that the project is in. Like if it is a construction project, you must have a background in all the processes involved.
There are certification programs for specializing in project management. I looked into it at one time. From what I understand, project management jobs usually entail lots of travel, which didn't fit my family situation.