Y is pointing to the

The diagram provided is a Function Analysis System Technique (FAST) diagram, a key tool in Value Methodology’s Function Analysis phase, as taught in the VMF 1 course. FAST diagrams map the relationships between functions of a system, showing “how” and “why” relationships to identify the critical logic path (the primary sequence of functions that achieve the system’s basic function) and minor logic paths (supporting functions). In FAST diagramming, functions are represented by boxes (e.g., G, H, J, K), and their relationships are shown with arrows.

Yis a red arrow connecting function G to function J, running horizontally across the diagram. In FAST diagrams, the horizontal path from left to right represents thecritical logic path, which answers the question “how” each function is achieved to fulfill the system’s primary purpose. Here, the path from E to F to G to J to L to M to N to O is the main sequence of functions, indicating the critical logic path.

Z(another red arrow) points to a vertical connection between J and K, which represents a minor logic path—supporting functions that occur simultaneously or are secondary to the main path.

Option A ("AND" Gate) and Option D ("OR" Gate) are incorrect because FAST diagrams use logic gates to show relationships between functions (e.g., AND for concurrent functions, OR for alternatives), but Y is an arrow on the main path, not a gate. Gates are typically symbols (e.g., triangles or diamonds) at junctions, not arrows.

Option B (Minor Logic Path) is incorrect because minor logic paths are vertical connections in FAST diagrams (e.g., Z pointing to J-K), not the horizontal path that Y indicates.

Option C (Critical Logic Path) is correct because Y lies on the main horizontal path, which represents the critical sequence of functions in a FAST diagram.