At many instances, it is important to keep a system from being destroyed or “lost” at a cost of not completing its mission. Therefore, to enhance survivability of many real-world critical systems (e.g. aircrafts and human space flight systems), mission abort procedures are often utilized in practice. In this article, in order to suggest an optimal abort policy, we first develop a methodology for obtaining the mission success probability and survivability of system experiencing both internal failures and external shocks. Each shock increases degradation in a system, and therefore, the number of experienced shocks can be considered as a decision parameter. We divide the mission time into a number of adjacent intervals and suggest a policy when a mission is aborted (and a rescue procedure is activated) if the number of shocks exceeds the value predetermined for each interval. We demonstrate the trade-off between system survivability and mission success probability that should be balanced by the proper choice of the mission abort policy. An illustrative example of a mission performed by an unmanned aerial vehicle is presented.

Gregory Levitin

Maxim Finkelstein

Proceedings of the Institution of Mechanical Engineers Part O Journal of Risk and Reliability

风险与可靠性杂志面向参与风险分析和可靠性工程领域的研究人员和从业人员。该杂志的职权范围涵盖了正确理解、评估、表征和管理工程系统的风险和可靠性的概念、理论、原则、方法、方法和模型。该杂志欢迎基于数学和概率分析、模拟和/或优化的论文，以及突出概念和管理问题的作品。也欢迎提供有关当前实践和方法以及如何改进这些观点的论文

The Proceedings of the Institution of Mechanical Engineers, Part O: Journal of Risk and Reliability is a journal aimed at researchers and practitioners involved in the fields of risk analysis and reliability engineering. The scope of the journal encompasses the concepts, theories, principles, methods, and models related to the understanding, assessment, characterization, and management of risks and reliability in engineering systems. We welcome papers based on mathematical and probabilistic analysis, simulation, and/or optimization, as well as works that highlight conceptual and management issues. Contributions discussing current practices and methods, particularly how to improve these perspectives, are also encouraged.

《Proceedings of the Institution of Mechanical Engineers, Part O: Journal of Risk and Reliability》是一本面向风险分析和可靠性工程领域研究人员及从业者的杂志。该杂志的范围涵盖了对工程系统风险和可靠性的理解、评估、表征和管理的概念、理论、原则、方法和模型。我们欢迎基于数学和概率分析、模拟和/或优化的研究论文，以及关注概念和管理问题的作品。同时，也欢迎提供关于当前实践和方法的论文，尤其是如何改进这些方法的探讨。

Proceedings of the Institution of Mechanical Engineers, Part O: Journal of Risk and Reliability

Optimal mission abort policy with multiple shock number thresholds

This article develops a methodology for obtaining the mission success probability and survivability of system experiencing both internal failures and external shocks and suggests a policy when a mission is aborted if the number of shocks exceeds the value predetermined for each interval.

Category	Quartile
工程技术	4
工程技术, 工程工业	4
工程技术, 工程综合	4
工程技术, 运筹学与管理科学	4

Optimal mission abort policy with multiple shock number thresholds

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Category	Quartile
OPERATIONS RESEARCH & MANAGEMENT SCIENCE	3