系统工程第二章课件.pptVIP

2007 SYSTEMS ENGINEERING 2007 SYSTEMS ENGINEERING Chapter 2 Methodological Frameworks and Systems Engineering Processes (方法论框架和系统工程过程) There are a number of frameworks（框架、体系） that we might use to characterize （描绘） systems engineering efforts. We will describe some of them in this chapter. Without a sound and well-understood product line, or process, for the acquisition or production of large systems, it is very likely that there will be a number of flaws （缺点） in the resulting system itself. Thus, the definition, development, and deployment （部署） of an appropriate （恰当的） process, or set of processes, for systems production is very important. 2.1 INTRODUCTION In this chapter we first discuss the nature of systems acquisition （收购）, production （生产）, procurement （采购）, or manufacturing （制造业）. We will generally （通常） use the word acquisition to describe each of these efforts. As systems engineers, we are primarily concerned with the functional and physical architectures that lead to implementation architectures and the resulting detailed design of systems of all types. Design and development is very important, even though the acquisition or production process also depends upon success in the definition and deployment （部署） phases of the life cycle. Design and development is a creative process through which system products, presumed to be responsive to client needs and requirements, are conceptualized or specified, manufactured or otherwise produced, and fielded or implemented in such a way that they can be maintained over time. 2.1 INTRODUCTION There are four primary ingredients in our definition of design and development, and they apply to software design as well as to the design of hardware and physical systems. Development results from specifications （规格） or architecture for a product or system. Development is a creative process. Development activity includes design effort, which is conceptual in natu