The project management term near-critical activity refers specifically to a project work schedule activity that is designated by the project team and or the project team leader as one that has been assigned the label of having a low total float. This idea, that being one of a near-critical activity, can be applied with equal weight and equal occurrence to any particular work schedule activity and can also be applied to any particular work schedule network path depending on how the project team and or the project team leader see fit to designate. Total float is considered among the project team to represent the limit below the near-critical activity, and the determination as to whether any particular work schedule activity fits into either category is to be determined by the project team and pro the project team leader through use of expert judgment. Additionally, the designation of work schedule activities as such can vary from project to project.
This term is defined in the 3rd and the 4th edition of the PMBOK.