is reached note that as compared with fig1 the point 203 is located much closer to failure point 201 for example less than three standard deviations thus the distance 204 is much less than 104 thus each computer system of fig2 is operating closer to it peak capabilities than the systems of fig1 note that the curve 200 may be achieved by increasing the performance of the systems of fig1 e g increasing processor speed or other functionality of each system so that more heat is generated and or more power is needed in other words the failure point 201 is the same as the failure point 101 and the typical operating region 202 has moved closer to the failure point 201 alternatively the curve 200 may be achieved by reducing the redundancy and or over capacity such that the system has reduced environmental capacity e g removing or not installing n 1 redundancy in other words the typical operating region has remained the same between fig1 and 2 and the failure point 201 has moved closer to the operating region 202 alternatively the curve 200 may be achieved by both increasing performance and reducing the redundancy and or over capacity as described earlier embodiments of the invention prevent failure of the computer system by placing the computer system in mode.