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CORNELL CS 501 - Lecture 1 Introduction to Software Engineering

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CS 501: Software Engineering Fall 2000Course AdministrationCode of ConductProjectsProject SelectionPrevious ExperienceFuture ExperienceCourse ThemesSlide 9Characteristics of Software ProductsSoftware as a ProductClient (a.k.a Customer)Variety of Software ProductsCategories of ProductSlide 15Professional ResponsibilityNext StepsCS 501: Software EngineeringFall 2000Lecture 1Introduction to Software EngineeringCourse AdministrationWeb site: www.cs.cornell.edu/cs501-fa00Instructor: William ArmsTeaching assistants: Ken Hopkinson, Amy SiuAssistant: Rosemary AdessaComputer lab: Computer Science Undergraduate Lab, Upson Hall, Room 315/317.Code of Conduct Software Engineering is a collaborative activity. You are encouraged to work together, but ... Some tasks may require individual work. Always give credit to your sources and collaborators.Good professional practice: To make use of the expertise of others and to build on previous work, with proper attribution. Unethical and academic plagiarism: To use the efforts of others without attribution.Projects Project teams, about 5 to 7 people. Select your own project, any branch of software engineering Real project for real client who intends to use the software in production. Feasibility study and plan: September 13 Presentations:requirementsdesignfinalProject Selection Some suggested projects on the web site Recitation section on Monday to suggest projectsContact potential clients: Gain idea of their expectations Estimate scope and complexity of the project Discuss business decisionsAssemble project team Advertise on the web sitePrevious ExperienceYour background Biggest program that you have written? Biggest program that you have worked on? Biggest project team that you have been part of? Longest project that you have worked on? Most people who have used your work? Longest that your project has been in production?My backgroundFuture ExperienceWhat will you be doing one year from now? Ten years from now?Course Themes1. Leadership of large software projects Software as a product Clients and their needs Quality Requirements and specification Usability Evolution Project management Personnel management Economic, legal, and social factorsCourse Themes2. Large and very large systems Software design Software architecture Object-oriented design Dependable systems Reliability Verification Legacy systemsCharacteristics of Software ProductsGeneral characteristics Usability Maintainability Dependability EfficiencyGood software products require good programming, but ...Programming quality is the means to the end, not the end itself.Example: DEC's optical scannerSoftware as a ProductSoftware is expensive!!Every software project has a trade-off between: Functionality Resources (cost) TimelinessExample: Andrew console monitorClient (a.k.a Customer) The client provides resources and expects some product in return.  Client satisfaction is the primary measurement of success.Question: Who is the client for Microsoft Excel?Variety of Software ProductsExamples?Categories of ProductCategories of client and software product: Generic (e.g., Microsoft Excel) Bespoke (customized) (e.g., IRS internal system)Many systems are customized versions of generic packages (e.g., Cornell's payroll system)Variety of Software ProductsSoftware products are very varied--> Client requirements are very different--> There is no standard process for software engineering--> There is no best language, operating system, platform, database system, development environment, etc.A skilled software developer knows about a wide variety of approaches, methods, tools. The craft of software engineering is to select appropriate methods for each project and apply them effectively.Professional Responsibility Organizations put trust in software developers: Competence: Software that does not work effectively can destroy an organization. Confidentiality: Software developers and systems administrators may have access to highly confidential information (e.g., trade secrets, personal data). Legal environment: Software exists in a complex legal environment (e.g., intellectual property, obscenity). Acceptable use and misuse: Computer abuse can paralyze an organization (e.g., the Internet worm).Next Steps Selection of projectsadvertise -- send message to TAs and they will post on web site Recitation section Monday at


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