A New Simulation Method for System Dependability Analysis

当今复杂的制度环境和竞争的经济环境要求对可靠性和质量问题做出准确的回答。当前工具不提供对复杂故障处理场景进行建模的能力，并且通常需要简化关于故障率、维修率和初始状态的假设，从而导致不正确的解决方案。准确的可靠性评估是系统制造商和用户都关心的问题，他们经常投资数百万美元来保持系统的正常运行。在商业和军事环境中都需要一种能够解决这些问题的可靠性工具。研究了基于彩虹网的仿真工具的开发。彩虹网通过显著降低模型的复杂性，克服了以往基于网的模型的局限性。这种减少是通过可以创建、销毁并具有身份和特征的分层令牌，以及通过其激活由一组规则或算法管理的转换来实现的。

Today's complex system environment and competitive economic environment demand precise answers to questions concerning dependability and quality. Current tools are not providing the ability to model complex fault handling scenarios and often require simplifying assumptions about failure rates, repair rates, and initial states which lead to incorrect solutions. Accurate dependability evaluations are a concern of both manufacturers and users of systems who often invest millions of dollars to keep systems operating correctly. A dependability tool that can address these concerns is in demand in both the commercial and military environments. The development of a simulation tool based on Rainbow Nets is investigated. Rainbow Nets overcome limitations of previous net-based models by significantly reducing the model complexity. This reduction is achieved by hierarchical tokens, which can be created, destroyed, and have identities and features, and by transitions whose activation is governed by a set of rules or an algorithm.