Diagnostic method of observed discontinues in the information system based on the use of the two-level system for provision of functional sustainability
DOI: 10.31673/2412-4338.2019.012230
Abstract
In this paper one of the main properties of enterprise information systems is considered - functional stability. Under functional stability refers to the property of an enterprise information system to store, during a given time, the performance of its main functions within the limits set by regulatory requirements, under conditions of influence of flows of failures, malfunctions, failures. This property is closely related to the properties of stability, reliability, durability and fault-tolerance.
In accordance with the concept of hierarchical organization of means of ensuring functional stability, for the diagnosis of information system with hidden failures, several levels should be used. Hidden refusal is a refusal which is not revealed visually or by staff methods and means of control and diagnostics, but is revealed during maintenance or special methods of diagnosis. At the first level, simple diagnostic procedures are used. If they can identify the rejected sites, then this diagnosis ends with the least waste of time. In the event of uncertainty in the definition of the components of the rejected system, the next level of the hierarchy must run diagnostic procedures that can handle more complex failures.
Based on the use of the hierarchical concept of organization of means for ensuring the functional stability of the enterprise information system, two algorithms have been developed that form a two-level system for diagnosing hidden failures. Diagnosis begins with the implementation of the first algorithm, the advantages of which compared to known algorithms are that it requires less redundancy of the system, only two rounds of communication between the nodes of the enterprise information system and provides diagnosis of the information system in the rejection of almost half of its nodes.
In the case of an ambiguous solution to the diagnostic problem, the algorithm generates a signal about its failure and the diagnosis of the information system proceeds according to a second algorithm, which uses the duration of the phases as a criterion.
Keywords: functional stability, automated enterprise management system, external and internal destabilizing factors.
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