Also, unless some form of interest rate protection is arranged, the interest rate on the 10-year debt issue is uncertain. On the other hand, the construction contract eliminates uncertainty with regard to the construction cost. Design changes could affect this cost, but the Cogeneration Project is unlikely to require significant design changes because it will utilize a plant design developed previously. The 15-year electric power purchase agreement and the 15 year steam purchase agreement mitigate output pricing risk. There is still a risk that revenues might fall short of expectations because of unplanned outages; however, this risk is small because the operating reliability of similar plants has been well-documented. The 15 year gas supply agreement eliminates gas price risk. If these contracts were not in place, then a sensitivity analysis would have to be performed for each of the factors mentioned construction cost, electricity price, steam price, gas price, and the levels of electric power and steam output.