The data center of an e-commerce firm in Palo Alto relies on a diesel power generator as a backup power source in cases of power outages. The generator requires a warm-up period before it is able to satisfy the full power demand of the servers in the data center. The warm-up time is normally distributed with an average of 80 seconds and a standard deviation of 20 seconds. From the specifications of the servers' internal power backup systems, it is estimated that the acceptable time for the data center to be out of power is 2 minutes.
Q4.1 – In this environment, what is the upper capability measure of the warm-up time for the backup power system?