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IS = Parts working together to deliver information to users.

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

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IS = Parts working together to deliver information to users.

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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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