IST352 - Lab 1 Process Modeling Using Visio 2010(1)

IST352 - Lab 1 Process Modeling Using Visio 2010(1) -...

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IST352 – Information Analysis of Organizational Systems Lab 1 Process Modeling Fall 2011 Building Process Models using Microsoft Visio Building the process model is an important element of good logical design. Sometimes analysts start process modeling in the later stages of the analysis phase; but you will find that most of your process modeling will take place after you have gathered most of the business requirements. The process model is the vehicle that allows the systems analyst to represent the logical design of the new information system. The process model is the logical depiction of the information system, its inputs, outputs and processes before they become encapsulated into software. The activity of showing the data sources as it moves from process to process then eventually to where it is needed to make decisions is known as process modeling. With software development tools becoming relatively easy to use, the process modeling step is sometimes skipped resulting in poorly designed information systems; therefore, resulting in systems that perform poorly and are difficult to maintain. During the process modeling activity, the systems analyst collects the appropriate business requirements then translates them into business rules. Within that rule set the analyst looks for data sources and destinations (sinks), processes on the data and places for where data needs to be stored for later use. The analyst can then use a tool like Microsoft Visio (there also many others) to build process models to display them in a way that can be communicated and understood by the end user. In this lab exercise, we will explore Visio’s basic features for building process model Data Flow Diagrams (or DFDs) using the Gane and Sarson DFD notation developed in 1979 by Chris Gane and Trish Sarson. The other major influence on process modeling came from Tom DeMarco and Ed Yourdon also in 1979; but we won’t be using their notion, but you should keep in mind some organizations do use DeMarco and Yourdon, so you should be aware that they exist. Materials needed to do this Lab Microsoft Visio Learning Objectives The student will learn: Describe process modeling terminology for: process, process model, DFD, context diagram, source/sink, data store, data flow Explain the relationship between the DFD and the physical implementation of the system software and data structures Use the basic functions and features of Microsoft Visio Lab Setup – Establishing Visio Parameters Microsoft Visio has an extensive library of functions and features that initially seem overwhelming. This library contains a number of shapes that make it easy for information
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This note was uploaded on 12/13/2011 for the course IST 352 taught by Professor Staff during the Fall '10 term at Syracuse.

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IST352 - Lab 1 Process Modeling Using Visio 2010(1) -...

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