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Recently, market and user preferences have been drastically changing; user oriented production and logistic systems such as the supply chain management system have been required. In this kind of system, different subsystems with heterogeneous level of reliability have to coexist while trying to preserve the one click response and the flexibility in order to satisfy the frequently changing and heterogeneous preferences of the users. Thus assurance is required. An autonomous decentralized database system is proposed in order to realize the assurance. In this architecture, every site can autonomously control its own database within a permissible value, and coordinate among the sites by a mobile agent. Moreover, the autonomous consistency coordination technique is proposed in order to solve the problem of integrating and keeping the consistency of DB systems with heterogeneous levels of reliability. This technique is based on the inherent properties of autonomous decentralized systems (ADS) to attain the on-line property by the use of a data field among the replicated sites. Furthermore, an evaluation of the proposed technique is showed.