L1 - CS 514-D Software Product Process Evaluation Lecture...

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CS 514-D Software Product & Process Evaluation Lecture Notes 1: Introduction. Fall 2006 James M. Bieman Copyright © 2000 - 2006 James M. Bieman 1-1 CS 514 Copyright © 2000 - 2006 James M. Bieman 1-1 Chapter 1 Chapter 1 Introduction to Software Introduction to Software Product & Process Evaluation Product & Process Evaluation James M. Bieman Computer Science Department Colorado State University CS 514 Copyright © 2000-2006 James M. Bieman 1-2 Outline Outline 1. Motivation. 2. Software evaluation: Product, resource, process. 3. Connections & controversy. 4. Evaluation & Measurement. CS 514 Copyright © 2000-2006 James M. Bieman 1-3 Motivation: Better Software Motivation: Better Software z Meets users & customers needs: Usable, reliable, robust, available. Software evolves as needed. z Meets needs of developers, including management & technical staff: Easy to design, adapt & maintain, development meets schedule & budget constraints, testable, meets customer needs.
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CS 514-D Software Product & Process Evaluation Lecture Notes 1: Introduction. Fall 2006 James M. Bieman Copyright © 2000 - 2006 James M. Bieman 1-2 CS 514 Copyright © 2000-2006 James M. Bieman 1-4 Motivation: Usable Software Motivation: Usable Software z Provides desired functionality. z Functionality can be easily accessed. Interface meets expectation. Useful user documentation. Can interface with other software and hardware (interoperability). CS 514 Copyright © 2000-2006 James M. Bieman 1-5 Motivation: Reliable Software Motivation: Reliable Software z Few defects. z Rarely fails. z Available. z Low defect discovery rate. z Design structures that do not tend to hide faults. CS 514 Copyright © 2000-2006 James M. Bieman 1-6 Motivation: Better SW Designs Motivation: Better SW Designs z High cohesion & low coupling. z Appropriate structure: good use of: Abstraction. Encapsulation. Inheritance. Aggregation. z Use of design/architectural patterns.
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CS 514-D Software Product & Process Evaluation Lecture Notes 1: Introduction. Fall 2006 James M. Bieman Copyright © 2000 - 2006 James M. Bieman 1-3 CS 514 Copyright © 2000-2006 James M. Bieman 1-7 Motivation: Maintainable Motivation: Maintainable & Adaptable Software & Adaptable Software z Designs that are easy to modify. Add new features. Modify existing features. Adapt system for use in a new environment or for a new use. z Changes or adaptation requires minimal effort. CS 514 Copyright © 2000-2006 James M. Bieman 1-8 Motivation: Testable Software Motivation: Testable Software z Software developed in a way that makes testing activities easy to perform. Generate test cases. Execute test cases. Determine the success or failure of a test run. Develop regression test cases. CS 514 Copyright © 2000-2006 James M. Bieman 1-9 Product Quality Has Many Facets Product Quality Has Many Facets z Internal quality: cohesion, coupling, abstraction, encapsulation, good use of inheritance, aggregation, association, patterns, etc.
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