Ergonomics is concerned with understanding interactions between humans and other elements of systems. It aims to optimize human well-being and overall system performance through applying principles to design. Flexible working refers to working schedules that vary from normal fixed patterns, allowing changes to hours, place of work, etc. Flexible arrangements like flextime, compressed weeks, job sharing and telecommuting can benefit both employees and employers by improving work-life balance, recruitment/retention, and reducing costs. Eastman Kodak implemented various flexible policies for its 70,000+ global workforce to meet desires for work-life balance while maintaining business needs.