The two factors that define system reliability are redundancy and the quality of the individual components. Dorsett's Info-Scan 2000 architecture is designed to support full redundancy of all critical components, so that a single failure will not reduce the functionality of the system. To further enhance reliability the selected individual components are of the highest quality available in the industry today.

This is clearly demonstrated by their mean-time-between-failure ratings which are among the best in the industry. A typical Dorsett's Info-Scan 2000 redundant system has an availability rating approaching 100%. Dorsett's also has a non-redundant Info-Scan 2000 system designed for customers whose requirements do not necessitate this feature. Due to the quality of the Info-Scan 2000 components, a non-redundant system has an availability rating of nearly 99.8%, which is better than most fully redundant systems from competitors.

A major issue with any redundant system is maintaining up-to-date copies of the real-time database at both System Processing Units (SPUs). When the on-line SPU fails in a redundant configuration the standby SPU must take over the role of on-line SPU as if nothing has happened. Info-Scan 2000 implements disk mirroring for all disk operations to ensure the concurrency of the real-time databases between the on-line and standby SPUs. This process ensures the system is able to continue without loss of data or alarms.