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Understanding Information Systems Analysis & Design

Discover the components and processes of Information Systems, various system views, tools for analysis, and challenges faced in system analysis. Emphasis on MIS perspective, management aspects, and tools for system design.

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Understanding Information Systems Analysis & Design

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  1. Systems Analysis & Design Summary What is Information System: • IS = Parts working together to deliver information to users. • Common View of IS: data, IT, processes, user interface • The importance of the process aspect—what processes do • (system functionality), and how they take control over • system (logic). More…

  2. System Services View of IS: - data management - data processing - user interface What is Information System • Object View: system parts are object and classes; • packages and components. • System Architecture View: IS is interrelated tiers.

  3. The Emphasis of the Course • Systems analysis— • - Analyzing organizational tasks and processes that • deliver some information—application domain • - Includes manual task and processes • - Deliverable: Logical design • Systems Design (some exercises, term paper)

  4. Tools for Systems Analysis Class/Object Diagram Data Flow Diagram Sequence Diagram Dialogue Diagram Activity Diagram Use Case Diagram Decision Table x x x x x x x x x x x x x x x = primary purpose a diagram is invented for x = provides hints/indications

  5. Challenges in Systems Analysis • What is in the system? Where is system boundary? • Process thinking (DFD, Activity Diagram) • vs. • Non-process thinking (use case diagram) • Focus on details and completeness • Capability to switch between big and small pictures • Capability to read (and sometimes write) different • notation schemes.

  6. Some Highlights • MIS Perspective emphasized: • - IS delivers information that serves organizational & • management purposes • - Management perspective (systems examples rooted • in specific organizational contexts; concern with • end-users, cost-benefit, systems adoption…) • 7 diagrams for systems analysis studied (see table) More…

  7. Some Highlights • 2 Tools: MS Project, Visio • Different systems studied: • sales and inventory tracking • doctor appointment, • email, DSS • prescriptions management • Web storefront • order management • class registration…

  8. Links to database management course (9.350) • Data modeling (class and object diagram) – drill down • on data part of class/object, not so much on methods part. • Information system – the data foundation is in • DB systems. IS is a more specific application, with • a purpose defined by the type of data/information it • delivers. That’s All Folks!

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