Abstract
A moderate-sized digital computer can be an effective tool in the calculation of the probability of simultaneous forced outages which are used in determining the generator reserve requirements of a utility system. The large amount of arithmetical work connected with an extensive study by the probability method makes the use of a digital computer imperative if the results are to be obtained in a reasonable length of time. This paper describes a program for the International Business Machines (IBM) 650 digital computer that has been written for this purpose.