Section 3 Basic Reuse Concepts Software reuse offers tremendous benefits in cost savings and quality; however,it requires technical understanding,changed approaches,and an understanding of potential obstacles. This section provides a frame of reference for understanding the benefits and challenges of software reuse.It introduces the terminology and concepts used in the remainder of the manual and explains the goals underlying the guidance provided herein. 3.1 Definitions A consistent terminology is used throughout this and companion manuals. The following are definitions of the key terms used in this manual: Reuse-the use of an existing software component in a new context,either elsewhere in the same system or in another system Reusabilit-the extent to which a software component is able to be reused. Conformance to an appropriate design and coding standard increases a component's reusability. Reusable software component (RSC)-a software entity intended for reuse;may be design,code,or other product of the software development process.RSCs are sometimes called“software assets'”. Reuser-an individual or organization that reuses an RSC Portabilit-the extent to which a software component originally developed on one computer and operating system can be used on another computer and/or operating system.A component's reusability potential is greater if it is easily portable. Domain-a class of related software applications.Domains are sometimes described as "vertical"-addressing all levels of a single application area (e.g.,command and control)and"horizontal"addressing a particular kind of software processing (e.g. data structure manipulation)across applications.The potential for reuse is generally greater within a single do ain. Domain analysis-the analysis of a selected domain to identify common structures and functions,with the objective of increasing reuse potential Librar -a collection of reusable software components,together with the procedures and support functions required to provide the components to users Retrieval systeman automated tool that supports classification and retrieval of reusable software components,also called a"repository" 313-1 Section 3 Basic Reuse Concepts Software reuse offers tremendous benefits in cost savings and quality; however, it requires technical understanding, changed approaches, and an understanding of potential obstacles. This section provides a frame of reference for understanding the benefits and challenges of software reuse. It introduces the terminology and concepts used in the remainder of the manual and explains the goals underlying the guidance provided herein. 3.1 Definitions A consistent terminology is used throughout this and companion manuals. The following are definitions of the key terms used in this manual: Reuse—the use of an existing software component in a new context, either elsewhere in the same system or in another system Reusability—the extent to which a software component is able to be reused. Conformance to an appropriate design and coding standard increases a component’s reusability. Reusable software component (RSC)—a software entity intended for reuse; may be design, code, or other product of the software development process. RSCs are sometimes called “software assets”. Reuser—an individual or organization that reuses an RSC Portability—the extent to which a software component originally developed on one computer and operating system can be used on another computer and/or operating system. A component’s reusability potential is greater if it is easily portable. Domain—a class of related software applications. Domains are sometimes described as “vertical”—addressing all levels of a single application area (e.g., command and control) and “horizontal”—addressing a particular kind of software processing (e.g., data structure manipulation) across applications. The potential for reuse is generally greater within a single domain. Domain analysis—the analysis of a selected domain to identify common structures and functions, with the objective of increasing reuse potential Library—a collection of reusable software components, together with the procedures and support functions required to provide the components to users Retrieval system—an automated tool that supports classification and retrieval of reusable software components, also called a “repository