Which one of the following diagrams when properly laid out is always laid in a left to right display to properly reflect the chronology of all project work?

An influence diagram shows causal relationships and variable influences to support decision analysis and is not structured around left-to-right chronological display of project work.

A project schedule network diagram graphically represents the logical relationships and dependencies among project activities, and by convention is always drawn left to right to reflect the chronological progression of work. This layout makes it straightforward to trace the critical path and understand sequencing. It is a foundational output of the Sequence Activities process in the PMBOK Guide.

The Arrow Diagramming Method (ADM) is a technique for constructing network diagrams using arrows to represent activities, but it is a methodology rather than a distinct diagram type defined by strict left-to-right chronological layout.

A time-scaled schedule network diagram adds a calendar-based horizontal axis to a network diagram, but the basic project schedule network diagram is the broader category defined as always reflecting chronological sequence from left to right.