The schedulilng of hours of work is undoubtedly one of the major social problems of industrial society. Statistic estimates that 30% of Canada's workforce are involved in some kinds of shiftwork. Of those, 33% work irregular shifts, just under 30% work rotating shifts, 17% work long term evening shifts, 10% work on call, 3% work split shifts, 3% work long term night shifts and just over 3% are classed as "other". Present estimates tell us that before the trend slows, fully 35% of the workforce will work some type of shiftwork (Siroonian 123). Companies are feeling the need to maximize their efficiency by spreading their operating costs over 24 hours. However, on the other hand, wo