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Showing posts from November, 2017

[Review] What is a System of Systems and Why Should I Care?

SoS and SoS Engineering (SoSE) are becoming important while living in complex and diverse systems. Systems are ubiquitous. SoS is used in many places such as home, business, disaster response, defense, space exploration system. Key characteristics of SoS How So is Different from a System? SoS is that many systems belong to various people and organizations, and there are emergent behaviors and common purpose. What is still controversial is whether emergent behaviors should be planned and managed. Also, someone needs to create an integrated protocol that makes it easy to get in and out of the SoS. And it is said that someone should be well planned, tested and managed to avoid undesirable behaviors. What is unique about SoS is that each CS is Operationally independent and Managerially independent. Types of SoS Virtual: There is no central management authority and no obvious SoS goal. For example, Collaborative: There is no SoS engineering team, CS collaborates voluntarily for cen

[Review] Large-Scale Complex IT Systems

The complexity of the system's interactions caused a huge amount of loss in a short time, and people could not understand why. The current society depends on the complexity and complexity of complex IT systems, and we do not understand them well and do not have the SE techniques developed accordingly. Coalitions of Systems These systems are a collection of independently operated and managed systems. This can be called SoS. The so-called virtual SoS Maier mentioned is the coalition of systems here (the most free form without central management and common goals). The dynamic nature of this is a difficult point in software engineering. However, we must ensure that the system fails and that unintentional behavior does not harm individuals and society. System complexity There are many dynamic relationships, complex systems are nondeterministic, and can not predict the overall characteristics of a partial system. Complexity comes from dynamic relationships. And nonfunctional beha

[Review] Architecting Principles for Systems-of-Systems

Abstract We suggest the definition, classification, and structure of a system of systems. The system of systems is also called collaborative systems. The structure of the system of systems is mostly communications. 1. Summary Is there a difference between a complex large-scale system and systems of systems? There is operational / managerial independence as a method to classify them. Systems of systems or collaborative systems must fulfill two requirements. First, it has a valid purpose and works for it. Second, component systems are managed by their own purposes, not the whole purpose. SoS is defined on an interface basis. 2. Discussion 2.1. What is a "System of Systems"? "Assemblages of components that are themselves significantly more complex, so much so that they may be regarded as systems and assembled into a larger system" Collaborative system, federated system Examples: wide area networks (such as TCP / IP), integrated air defense: centralized co