Frank Bunker Gilbreth was an American engineer and management consultant known for his work in the field of time and motion study. He aimed to improve efficiency in the workplace by analyzing tasks and eliminating unnecessary movements. His innovative techniques helped streamline processes in various industries, making work easier and faster for employees. Gilbreth is also famous for his family, which he documented in the book Cheaper by the Dozen. This book humorously recounts the challenges and joys of raising twelve children while applying his efficiency principles at home. His legacy continues to influence modern management practices and workplace productivity.