Applications of 'human factors' and 'ergonomics' have mushroomed with the expansion of information and communications technology. Yet the essence of the discipline remains scientific applications of human knowledge to design and manage interfaces between individuals/groups and their physical and psychological environments.
Probably the best case studies are reported in technical journals such as 'Ergonomics', these classic titles provide illustrative examples:
> for physical ergonomics, 'Ergonomics, Work and Health', S Pheasant, Macmillan, 1992
> for psychological ergonomics, 'Human Error', J Reason, Cambridge University Press, 1990.
A case study of how applying ergonomics to the design of partial automation of manual handling in a logistics department is provided by K Duignan in 'Handbook of Business Psychology', Whurr, 2005; it indicates how relevant changes included not only the standard changes to seats, screens and tables but also elimination of some roles, creation of others and wakening the departmental manager from his tomb.
Several websites provide interesting examples of applying ergonomics. They include those of Auburn Engineers and of HumanTech who send regular e-newsletters to subscribers; HumanTech also provide high quality webinars free of charge.
For insights into diverse applications of ergs in a huge variety of settings, a good place to start is the website of the International Association for Ergonomics,
www.iea.cc, where you can find the URLs of professional national ergonomics societies, which in many cases present archives of newsletters and conference papers. The websites of the Australian, Canadian (French/English) and German (English/German) include particularly good illustrations of applications across many, many sectors (by no means only high hazard ones).
It's important to realise how ergonomics/human factors is still at a relatively adolescent stage. Two of the UK's leading ergonomists, R Haslam and C Williams, published research in Ergonomics reporting that leaders in the profession regarded lack of interpersonal skills as a major barrier to improving acceptance of the profession and discipline; regrettably they failed to identify any way to improve this deficit - which perhaps reflects how much the scale of the split which has grown between occupational psychology and ergonomics in recent decades has reduced the vitality of ergs/HF practice in the British Isles.