In the context of the PMI standards and the PMBOK® Guide, the Precedence Diagramming Method (PDM) is the standard tool and technique used for the Sequence Activities process.

Definition of PDM: This is a method used to create a project schedule network diagram. In this method, activities are represented by " nodes " (usually boxes), and the arrows represent the logical relationships (dependencies) between those activities.

Key Characteristics of PDM (Exhibit A Style):

It supports four types of dependencies: Finish-to-Start (FS), Finish-to-Finish (FF), Start-to-Start (SS), and Start-to-Finish (SF).

It is the most commonly used method in modern project management software.

It allows for the inclusion of leads and lags between activities.

Standard Representation: When an exam refers to a standard diagram showing boxes linked by arrows to show the flow of work, it is almost invariably referring to a Precedence Diagram.

Analysis of Other Options:

A. Activity-on-arrow (AOA) diagramming: Also known as Arrow Diagramming Method (ADM). In this older method, the arrows represent the activities, and the nodes represent milestones or events. It only supports Finish-to-Start relationships and is rarely used today.

C. Project schedule network diagramming: While PDM is a type of project schedule network diagram, " Project schedule network diagramming " is the general name of the output of the Sequence Activities process, whereas the question asks for the specific type or method shown in an exhibit (which typically illustrates the PDM technique).

D. Mathematical analysis diagramming: This is not a standard PMI term for a sequencing technique. Mathematical analysis usually refers to the Critical Path Method (CPM) or PERT, which are techniques used to calculate schedule dates using the network diagram, rather than the diagramming method itself.