Engineering psychology emerged to address issues caused by poor human-centered design. Prior to WWII, machines were designed without considering human factors, resulting in accidents from controls that did not match human abilities and expectations. Three Mile Island and other accidents showed the consequences of poor control design. Human factors research now aims to design safer, more usable systems through empirical studies of anthropometry, time-motion efficiency, and cognitive processes. By applying ergonomics to fit jobs and workplaces to human needs, productivity can increase up to 12% while reducing injury risks from issues like repetition, forceful exertions, awkward postures, and more.