Towards a Model-Based Methodology for a Highly Resilient Networked Service Provider System

拟议研究的目标是为高度可靠和有弹性的服务提供商系统开发一种基于模型的方法。近年来，复原力工程正在成为安全管理的一种新范式。广义地说，弹性是指系统为了维护系统安全而防止或适应不断变化的条件的能力。本文以电信和供水系统为例，对其进行了研究。本研究的具体目标包括：(1)建立网络服务系统的一般概念对象模型：该模型捕捉服务需求、供给、运行约束、结构、行为、原理以及社会和人文环境；(2)建立网络服务系统的动态模型：该模型捕捉网络服务系统在时间和空间上的复杂需求和供给流动；(3)建立网络服务提供者系统故障预测的一般方法，特别是与网络连接和级联效应相关的故障；以及(4)开发一种通用的方法来设计和规划网络服务系统，以防止预测的故障，从而增强系统的弹性。在设计和规划时，既考虑了需求实体，也考虑了供应实体。也就是说，可以通过重新配置需求、重新配置系统结构和重新分配供应资源来简单地做出设计决策。如果这项研究成功，将增进我们对安全管理学科中系统弹性的理解，并在工程设计和运营管理学科中产生新的知识。我们的国家安全政策说，国家没有比保护公民更大的作用了。这项研究的结果将通过减轻和防止网络服务系统--特别是关键基础设施系统--的故障，极大地增强加拿大的安全。

The goal of the proposed research is to develop a model-based methodology for a highly reliable and resilientservice provider system. Recently, resilience engineering is emerging to be a new paradigm for safetymanagement. Broadly speaking, resiliency is the ability of a system to prevent or adapt to changing conditionsin order to maintain system safety. To ground this research, telecommunication and water supply systems aretaken as examples. Specific objectives of this research include: (1) Develop a general conceptual object modelfor a networked service system: The model captures the service demand, supply, operation constraint, andstructure, behaviour, principle, and social and human environments; (2) Develop a dynamic model for thenetworked service system: The model captures complex demand and supply flows of a networked servicesystem with respect to time and space; (3) Develop a general methodology for predicting failures of anetworked service provider system, in particular those related to the network connection and cascading effect;and (4) Develop a general methodology for designing and planning a networked service system to preventpredicted failures and thus enhancing the system resilience. In designing and planning, both the demand andsupply entities are considered. That is to say, a design decision could simply be made on reconfiguring thedemand along with reconfiguring the structure of the system and reallocating supply resources.This research, if successfully, will advance our understanding of system resiliency in the discipline of safetymanagement and generate new knowledge in the discipline of engineering design and operations management.Safety is extremely important to Canada. Our national security policy says that there can be no greater role for anation than to protect its citizens. The outcome of this research will greatly enhance the safety of Canada bymitigating and preventing failures in networked service systems - particularly critical infrastructure systems.