Before revision: (35 year life expectancy) 18,000 When performing life-cycle cost analysis it should be apparent that the low bid is not the ideal bid for this particular situation, as the building owner will end up paying 18 ,000 for a roof that will not exceed the life of the PV warranty and have half the life expectancy of the high bid roof.
After revision: (35 year life expectancy) 4at least 18,000 (14,000 for the first re-roofing +detaching and resetting the new PV system for the second re-roofing + the costs of the second re-roofing),000 When performing life-cycle cost analysis it should be apparent that the low bid is not the ideal bid for this particular situation, as the building owner will end up paying 18 ,000 for a roof that will not exceed the life of the PV warranty and have half the life expectancy of the high bid roof.