first law states that “Errors are most frequent during the requirements and design activities and are the most expensive the later they are removed”. The majority of the errors are found in the requirements specification and design stages of the software development life cycle. If the requirements are not clear and complete‚ then it will lead
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PHASE 4: REQUIREMENTS ANALYSIS PHASE The Requirements Analysis Phase begins when the previous phase objectives have been achieved. Documentation related to user requirements from the Concept Development Phase and the Planning Phase shall be used as the basis for further user needs analysis and the development of detailed requirements. Multiple-release projects require only one iteration of the Requirements Analysis Phase‚ which should involve requirements definition for all planned releases. 1.0
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Table of Contents Glass’ Law 3 Example 3 Boehm’s first law 3 Example 4 Boehm’s second law 4 Example 4 Davis’ law 5 Waterfall model 5 Spiral Model 7 Waterfall model with Glass’ Law 8 Waterfall model with Boehm’s First Law 9 Waterfall model with Boehm’s Second Law 9 Waterfall model with Davis Law 10 Spiral model with Glass Law 10 Spiral model with Boehm’s First Law 11 Spiral model with Boehm’s Second Law 11 Spiral model with Davis’ Law 11 Waterfall Model 12 Examples where
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Introduction l Getting started with software engineering ©Ian Sommerville 2000 Software Engineering‚ 6th edition. Chapter 1 Slide 1 Objectives l l l To introduce software engineering and to explain its importance To set out the answers to key questions about software engineering To introduce ethical and professional issues and to explain why they are of concern to software engineers ©Ian Sommerville 2000 Software Engineering‚ 6th edition. Chapter 1 Slide 2 Topics
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to Software Engineering Somnuk Keretho‚ Assistant Professor Department of Computer Engineering Faculty of Engineering‚ Kasetsart University Email: sk@nontri.ku.ac.th URL: http://www.cpe.ku.ac.th/~sk Somnuk Keretho/Kasetsart University Outline of this presentation • • • • • • Scope of Software Engineering Object-Oriented Software Development Software Process Software Life-Cycle Models Object Orientation Software Quality Assessment Reference to Chapter 1/2/3 of “Software Engineering with
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Introduction 2. Chapter1 - History of software engineering & software Engineering as a Profession 3. Chapter2 - Software design & Modeling languages for software design 4. Chapter3 - Software development & Software Testing 5. Chapter4 - Software development process‚ Computer-aided Software engineering Software quality Introduction Software engineering The new Airbus A380 uses a substantial amount of software to create a "paperless" cockpit. Software engineering successfully maps and plans the millions
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The importance of high quality software Software development is a vital activity in modern American society‚ and is likely to have increasing significance in the future. Software manages our bank accounts‚ pays our salaries‚ controls the aircraft we fly in‚ regulates power generation and distribution‚ controls our communications‚ etc. Characteristics of high quality software High quality software shares the following obvious attributes: high quality software is intuitive and easy to use -- the
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Professional and ethical responsibility *Software engineering involves wider responsibilities than simply the application of technical skills *Software engineers must behave in an honest and ethically responsible way if they are to be respected as professionals *Ethical behaviour is more than simply upholding the law. Issues of professional responsibility l Confidentiality • Engineers should normally respect the confidentiality of their employers or clients irrespective of whether
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Introduction to Software Engineering * Software engineering * The economies of ALL developed nations are dependent on software * More and more systems are software controlled * Software engineering is concerned with theories‚ methods and tools for professional software development * Software engineering expenditure represents a significant fraction of GNP in all developed countries * Software costs * Software costs often dominate system costs. The costs of software on a PC are
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Introduction to Software Engineering Version 2 CSE IIT‚ Kharagpur Lesson 1 Basic Issues in Software Engineering Version 2 CSE IIT‚ Kharagpur Specific Instructional Objectives At the end of this lesson the student will be able to: • Identify the scope and necessity of software engineering. • Identify the causes of and solutions for software crisis. • Differentiate a piece of program from a software product. Scope and necessity of software engineering Software engineering is an engineering approach
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