Assessment of Integrated Electronic Information System survivability based on u-function

Considering vulnerable Integrative electronic information system (IEIS) operating under influence of external impacts and internal failures, the elements of IEIS work with different reliability and performance characteristics. In this paper we divided IEIS into basic element categories and element categories, which wok in multi-states. Basic element categories can meet its specified mission, which must be satisfied in survivability analysis. We define survivability as the performance of the basic element categories, and then get this performance using u-function to denote the survivability of IEIS, considering influence of external impacts and internal failures. The evaluation method is useful to combine the performance of the basic element categories and its survivability, and improve the survivability of the IEIS based on the basic elements in poor performance.