Template:Tires

Description
A car has four regular tires and a spare tire. Each tire has two failure modes: Wear with Weibull distribution (Beta=2,Eta=40000 miles) and Puncture with Exponential distribution (Mean=1year). Assume that 2 miles=1 hour. Both Wear and Puncture failures are repaired in two days. However, Wear is repaired as good as new, Puncture is repaired as bad as old. When regular tires fail, the spare tire is activated; upon regular tire is restored, the spare tire is deactivated ans put back.