Abstract

More and more organizations are running a clustered twin-computer system to tackle the rapidly growing demand of computer capacity. A prevailing rationale for a clustered twin-computer system isthat it is an effective way of coping with not only the capacity growth challenge but also the computer downtime problem. This paper develops an analytical model for a clustered twin-computer system subject to breakdowns with an aim to identifying conditions under which the clustered twin-computer system is a better alternative to a consolidated system. This research finds that the clustered twin-computer system has a shorter expected time in system for most cases. The clustered twin-computer system also performs better when there is a heavy traffic intensity. For firms with a consolidated single computer system, this research finds that it pays off to reduce the mean time to repair than to increase the mean time between failures

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