1. A system for calculating one or more frustration indices for a computer software user, wherein the frustration indices represent the user's computer software performance-related satisfaction experience as defined by one or more specified testing criteria and in one or more specified test scenarios, comprising: a set of target measurements B, each corresponding to one or more test criteria in one or more test scenarios and reflecting a user's expectation as to the performance of a computer software application; a set of actual measurements A, each corresponding to measurements of the one or more test criteria in the one or more test scenario; a priority weight D for each of the one or more test criteria; a logic or software for calculating an actual/target delta or delta percentage C between each of the set of actual measurements and target measurement; and a logic or software for calculating the one or more frustration indices F as ratios of the one or more actual/target delta or delta percentages to the corresponding priority weights, that reflect the user's likely satisfaction experience with the computer software application.