Which of the following terms is used for a schedule compression technique where two activities that were previously scheduled to start sequentially start at the same time?

Fast tracking is the correct term for the schedule compression technique where two activities that were previously scheduled to start sequentially begin at the same time. This method is often utilized in project management to shorten the project timeline without changing the scope of work. By overlapping tasks, teams can maximize efficiency and potentially reduce the completion time of the project.

This technique may involve risks, as parallel activities can lead to increased coordination challenges and dependency management issues. However, when executed properly, fast tracking can be an effective strategy for meeting deadlines and responding to project constraints.

Crashing, while also a schedule compression technique, focuses on adding additional resources to critical path tasks to complete them more quickly, rather than altering the scheduling of tasks. Resource leveling deals with resolving resource conflicts and ensuring that resources are allocated optimally without overloading them. Time-boxing refers to setting a fixed maximum duration for an activity or task, often used in Agile methodologies, but does not specifically pertain to scheduling activities in a concurrent manner.