In Value Methodology’s Function Analysis, functions are classified based on their characteristics, as taught in the VMF 1 course (Core Competency #2: Function Analysis). According to SAVE International’s Value Methodology Standard, “all-the-time functions are those that occur continuously or are always active during the operation of the system.” In a FAST diagram, all-the-time functions are often shown vertically (e.g., “when” direction) alongside the critical path, indicating they are ongoing while the main functions are performed. For example, in a car, “provide safety” (e.g., through seatbelts) is an all-the-time function because it is always active when the car is in use. This aligns with the FAST diagramming convention of showing simultaneous functions.
Option A (Outside the study scope) is incorrect because all-the-time functions are within the scope if they are part of the system’s operation, though they may be supporting functions.
Option B (A drain on resources) is incorrect because all-the-time functions are not necessarily resource-intensive; they are simply continuous.
Option C (Continuous) is correct, as it matches the definition of all-the-time functions in VM.
Option D (Undesirable) is incorrect because all-the-time functions are not inherently undesirable; they may be essential (e.g., “provide safety”).
[:, SAVE International, VMF 1 Core Competency #2 (Function Analysis), defining all-the-time functions as continuous in FAST diagramming., SAVE International, “Value Methodology Standard,” section on Function Analysis, describing all-the-time functions as those that occur continuously during system operation., ]
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