Degree of usefulness is the degree a person believes that using particular system or services would
enhance performance (Davis, 1989). Theory of Reasoned Action (TRA) by Ajzen and Fishbein (1980) is
about a person’s behavior as a positive function of his/her behavioral intention to perform the behavior. In
this case, the magnitude of value of the value of the facilities, resources and services in this research is
conceptualized as impact of the value parameters concerned which is a weighted score and calculated by
multiplying the respective items of frequency of use of the factors and its usefulness.