Indices to critical activities in stochastic PERT Networks

Measurement of activities in stochastic PERT Networks is important for allocating resources to important activities. There are several well-known indices for measuring the importance of activities, but they have some drawbacks and weak theoretical backgrounds. In this paper, the theoretical meaning of the known indices are discussed by using a two-value activity stochastic PERT Network, and new indices on importance of activities are proposed. Throughout numerical experiments the properties of proposed activities are compared with known indices, and one of new indices has no drawback for the cases tested.