Final answer:
Frank & Lillian Gilbreth were important in the scientific management field for promoting motion studies through their time and motion studies to improve worker efficiency.
Step-by-step explanation:
In the scientific management field, Frank & Lillian Gilbreth were important for promoting motion studies. They used time and motion studies to reduce the number of motions required to perform a task and improve worker efficiency. Frank & Lillian Gilbreth applied these methods not only to industry but also to other areas like the home and office.