It displays what the current system does without regard to how it does it It

It displays what the current system does without

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It displays what the current system does, without regard to how it does it It allows an analyst to understand the processes, functions, and data associated with a system without getting bogged down with hardware and software Functional Requirements This step of systems analysis is one of the most difficult Determine what type of information each business activity requires
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Try to determine the information processing capabilities required for each system activity The goal is to identify what should be done, not how to do it Examples of Functional Requirements User Interface: automatic entry of product data and easy-to-use data entry screens for Web customers Processing: fast, automatic calculation of sales totals and shipping costs Storage: fast retrieval and update of data from product, pricing, and customer databases Control: signals for data entry errors and quick e-mail confirmation for customers Systems Design Systems design focuses on three areas User interface Design Data Design Process Design Prototyping Prototyping is the rapid development and testing of working models An interactive, iterative process used during the design phase Makes development faster and easier, especially when end user requirements are hard to define Has enlarged the role of business stakeholders Prototyping Life Cycle (diagram in Developing Information System slides)
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User Interface Design Focuses on supporting the interactions between end users and their computer-based applications Designers concentrate on the design of attractive and efficient forms of user input and output Frequently a prototyping process Produces detailed design specifications for information products, such as display screens Checklist for Corporate Websites Remember the customer Aesthetics Broadband content Easy to navigate Searchability Incompatibilities Registration forms Dead links System Specifications Formalizing the design of: User interface methods and products Database structures Processing procedures Control procedures
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Examples of System Specifications User interface specifications: Use personalized screens that welcome repeat Web customers and that make product recommendations Database specifications: Develop databases that use object/relational database management software to organize access to all customer and inventory data and to multimedia product information Software specifications: Acquire an e-commerce software engine to process all e-commerce transactions with fast responses, i.e., retrieve necessary product data and compute all sales amounts in less than one second Hardware and network specifications: Install redundant networked Web servers and sufficient high-bandwidth telecommunications lines to host the company e-commerce website Personnel specifications Hire an e-commerce manager and specialists and a webmaster and Web designer to plan, develop, and manage e-commerce operations End User Development IS professionals play a consulting role, while uses do their own application development
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