Resource Management & Consumer Science

Frank B. Gilbreth and Lillian M. Gilbreth pioneered motion study and founded micro-motion film analysis using motion picture cameras and micro-chronometers. They divided human manual operations into fundamental elemental movements called therbligs to optimize work efficiency and reduce fatigue.

Option analysis:

• Gilbreth: Correct. Frank and Lillian Gilbreth founded micro-motion film study and motion economy principles.
• Mundel: Incorrect. Marvin Mundel developed the classes of change in work simplification.
• Gross and Crandall: Incorrect. Renowned home management textbook authors who synthesized management processes.
• Heiner and McCullough: Incorrect. Known for functional kitchen storage and workspace research.

Harmonious color schemes are classified as:

• Monochromatic: Variations of a single hue in different tints, values, and shades (III).
• Complementary: Hues directly opposite to each other across the Prang color wheel (IV).
• Analogous: Hues situated adjacent to each other on the color wheel sharing a common primary (I).
• Triad: Three colors placed equidistant from each other, forming an equilateral triangle (II).

Ergonomic standards for working heights relative to elbow height:
Precision work (writing, drawing, micro-electronic assembly): The work surface should be 5 cm (or 5 to 10 cm) above elbow height to provide arm support and reduce visual/neck fatigue.
Light manual work (reading, assembly): 5 to 10 cm below elbow height.
Heavy manual work (pressing, downward force exertion): 10 to 20 cm below elbow height to permit the use of upper body weight.

In high-noise work environments (like industrial workshops, heavy machinery bays), auditory speech signals suffer high acoustic interference and masking. Communication effectiveness is maximized by:
Shortening vocabulary to brief, distinct phonemes (B)
Limiting long sentences to avoid cognitive overload and missed syllables (C)
Using pre-established verbal or standard codes and protocols (D)