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Lecture Introduction to systems analysis and design: Chapter 8 - Whitten, Bentley

Chapter 8 - Process modeling. In this chapter you will learn how to draw data flow diagrams, a popular process model that documents a system’s processes and their data flows. You will know process modeling as a systems analysis tool when you can: Define systems modeling and differentiate between logical and physical system models, define process modeling and explain its benefits, recognize and understand the basic concepts and constructs of a process model,. | Chapter 8 Process Modeling This repository of slides is intended to support the named chapter. The slide repository should be used as follows: Copy the file to a unique name for your course and unit. Edit the file by deleting those slides you don’t want to cover, editing other slides as appropriate to your course, and adding slides as desired. Print the slides to produce transparency masters or print directly to film or present the slides using a computer image projector. Each slide includes instructor notes. To view those notes in PowerPoint, click-left on the View Menu; then click left on Notes View sub-menu. You may need to scroll down to see the instructor notes. Objectives Define process modeling and explain its benefits. Recognize and understand basic concepts and constructs of a process model. Read and interpret a data flow diagram. Explain when to construct process models and where to store them. Construct a context diagram to illustrate a system’s interfaces with its . | Chapter 8 Process Modeling This repository of slides is intended to support the named chapter. The slide repository should be used as follows: Copy the file to a unique name for your course and unit. Edit the file by deleting those slides you don’t want to cover, editing other slides as appropriate to your course, and adding slides as desired. Print the slides to produce transparency masters or print directly to film or present the slides using a computer image projector. Each slide includes instructor notes. To view those notes in PowerPoint, click-left on the View Menu; then click left on Notes View sub-menu. You may need to scroll down to see the instructor notes. Objectives Define process modeling and explain its benefits. Recognize and understand basic concepts and constructs of a process model. Read and interpret a data flow diagram. Explain when to construct process models and where to store them. Construct a context diagram to illustrate a system’s interfaces with its environment. Identify use cases, external and temporal business events. Perform event partitioning and organize events in a functional decomposition diagram. Draw event diagrams and merge them into a system diagram. Draw primitive data flow diagrams and describe the elementary data flows in terms of data structures and procedural logic (Structured English and decision tables), respectively. Chapter 8 objectives. Process Modeling and DFDs Process modeling – a technique used to organize and document a system’s processes. Flow of data through processes Logic Policies Procedures Data flow diagram (DFD) – a process model used to depict the flow of data through a system and the work or processing performed by the system. Synonyms are bubble chart, transformation graph, and process model. The DFD has also become a popular tool for business process redesign. Teaching Notes Many, if not most students have drawn or seen process models in the form of program flowcharts. Unfortunately, flowcharts are .