On the function logic path in a FAST diagram.

The correct answers are A, C, and E . In the Function Analysis Phase, FAST diagramming organizes functions by How-Why logic , not by chronological sequence. SAVE’s course structure places FAST Diagrams , How-Why and When Logic , and FAST Diagram Structure directly under the Function Analysis Phase, confirming that this is a core function-modeling competency. ( SAVE International Online Courses )

On the logic path, moving left to right answers the question, “How is this function achieved?” Therefore, the function on the right represents the approach, means, or method used to perform the function on the left. Conversely, moving right to left answers “Why is this function performed?” Therefore, the function on the left expresses the goal, purpose, or higher-order reason for the function on the right. FAST guidance also states that higher-order functions are toward the left, while lower-order functions describing how they are accomplished are toward the right. ( Value Analysis )

A change to a function or method on the critical logic path affects the functions dependent on it, which are located to its right. ( )

References/topics: Function Analysis Phase; FAST Diagramming; How-Why Logic; Critical Path Functions.