At Dyson, they work towards one idea: that everyday objects can be made to work better. Its an obsession. As a result, they're never completely satisfied, not even with their own machines, so they test and analyze them rigorously. For example, Their microbiology lab grows and studies bacteria, mould and dust mites to discover better ways of removing them from your home. The results from development testing are used to improve the design of the next generation of Dyson machines. Thousands of prototypes are built to refine the improvements one at a time, starting with hand-made cardboard models. Later, complex selective laser sintering tools build fully functional prototypes for testing in their laboratories. Finally, every cleaner is subjected to a battery of endurance tests to ensure that its as durable as a Dyson should be. At their test facility in Wiltshire, Dysons are pushed, pulled, dropped, frozen, baked and shaken. They also have five vacuum cleaner assault courses where the most demanding test of all human use puts machines through their paces, with 28,000 hours of punishment doled out every month.