What term refers to the unique identifier assigned to every activity in a project?

The term that refers to the unique identifier assigned to every activity in a project is "Node label." In project management, especially in graphical representations like project network diagrams or Gantt charts, each activity is assigned a distinct identifier for clarity and tracking purposes. This identifier, commonly referred to as a node label, helps in easily referencing specific activities when discussing project elements, analyzing dependencies, or monitoring progress.

Node labels typically consist of numbers, letters, or a combination of both, providing a systematic way to categorize and manage various project tasks. By using these identifiers, project managers can ensure that all stakeholders are on the same page regarding which specific activities are being referenced, ultimately enhancing communication and efficiency throughout the project lifecycle.