ERIC Number: ED050797
Record Type: RIE
Publication Date: 1969-Jun
A Basis for Time and Cost Evaluation of Information Systems.
Korfhage, R. R.; DeLutis, T. G.
A general model for information storage and retrieval (IS&R) systems is proposed. The system is selected from the set of all available IS&R components. These components define the system's users and data sources; the hardware, software, and personnel performing the actual storage and retrieval activities; and the funder who acts as a filter in the selection of the components comprising the system. The outermost level, the ectosystem, includes the funder, and user groups, and the data sources. All other levels belong to the endosystem. Each level within the endosystem consists functionally of processing components and storage components. It is proposed that a measure of the endosystem performance, as a function of the time to complete a requested service can be obtained by specifying the characteristics of these functional components for a specific hardware/software configuration and the characteristics of the user groups. Finally, the selection process for all system components is related to the performance of the endosystem, and to the cost for this level of performance as a function of the ectosystem. (Author/MM)
Publication Type: N/A
Education Level: N/A
Sponsor: National Science Foundation, Washington, DC.
Authoring Institution: Purdue Univ., Lafayette, IN. School of Industrial Engineering.
Note: Presented at the Sixth Annual National Information Retrieval Colloquium, May 8-9, 1969