The two word phrase initiating process refers specifically to a particular group or processes, the purpose of which is for the sole and express authorization by those who have the power to make the determination as to when it may be feasible and or appropriate to resume work on any particular work schedule activity that has been halted previously for one reason or another. This authorization is traditionally coming on the heels of a redefinition of scope for the particular activity phase or project which may then allow the particular activity to be restarted. The initiating processes are quite typically performed by groups and individuals that are actually outside of the actual scope of control within the project and rather, represent interested but not directly controlling members of the organization, program, and or portfolio processes. These individuals typically will weigh in and provide insight as to the initiating process for this particular activity and or event.
This term is defined in the 3rd and the 4th edition of the PMBOK.