Ch 5 p1

• Backbone system


  : Basic system structure on which to build
• Break-even point


  The point where total costs equal total benefits
• Class


  : It is a blueprint that defines the attributes and the methods common to all objects of a certain type.
• cold turkey cutover


  : Under this approach, the firm switches to the new system and simultaneously terminates the old system.
• Conceptual design


  : The production of several alternative designs for the new system.
• Cutover


  : The process of converting from the old system to the new system.
• Data flow diagrams (DFDs)


  : The top-down decomposition of a hypothetical business process.
• Detailed design report


  : Depict the top-down decomposition of a hypothetical business process.
• Economic feasibility


  : Financial analysis to the project in view of other competing capital projects under consideration.
• Encapsulation


  : It is the act of placing data and methods in the same class and thus restricting access to the object’s components.
• End user


  : Users for whom the system is built.
• Event-driven language


  : Designed to respond to external actions commence by the user.
• Frequent light user


  : Tends not to explore beneath the surface and lack depth of familiar with limited aspects of the system knowledge.
• Frequent power user


  : Those users who understand the existing system and will readily adapt to new systems. They are intolerant of detailed instructions that waste their time. They like to find shortcuts and use macro commands to improve performance. This group requires only abbreviated documentation.
• General accounting system


  : Designed to serve a wide variety of user needs.
• Help features


  : Analyzes the context problem and display error message on the screen.
• Inheritance


  It means that each object instance inherits the attributes and methods of the class to which it belongs.
• Instance


  : Single occurrence of an object within a class.
• Intangible benefits


  : Overriding importance in information system decisions.
• Iterative approach


  : Modules cycle through all of the SDLC phases rather rapidly, with a short time frame from beginning to end.
• Legal feasibility


  : The company’s ability to discharge its legal responsibilities between the conceptual systems.
• Net present value method


  : Projects with a positive net present values are economically feasible to present value of the costs is deducted from the present value of the benefits over the life of the system.
• New systems development


  : Process that involves five steps: identifying the problem, understanding what needs to be done, considering alternative solutions, selecting the best solution and implementing the solution.
• Novice


  : Little or no experience with computers and about their assigned tasks.
• Object


  : Equivalent to nouns in the English language.
• Object-oriented design (OOD) approach


  : Building information systems from reusable standard components or modules.
• Object-oriented programming (OOP) language


  : Based on high-level programming language and processes with the design of software and applications.
• Occasional users


  : The users who once understood the system but have forgotten some essential commands and procedures.
• Office automation system


  : Computer systems that improve the productivity of office workers automation systems include word processing packages, database management systems, spreadsheet programs, and desktop publishing systems.
• Operational feasibility


  : The new system may require adopting new procedures and retraining operations personnel skills and the operational requirements of the new system.