cis321_w4_ilab_milestone_4_parti_description

cis321_w4_ilab_milestone_4_parti_description - Week 4:...

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Week 4: Milestone 4, Part I Description CIS321_W4_iLab_Milestone_4_PartI_Description .docx Page 1 Data Modeling and Analysis The requirements analysis phase answers the question, “What does the user need and want from a new system?” The requirements analysis phase is critical to the success of any new information system! In this milestone we need to identify what information systems requirements need to be defined from the system users’ perspectives and draw graphical, logical models to document the data requirements for a new and improved system. Data modeling is a technique for organizing and documenting a system’s data. Data modeling is sometimes called database modeling because a data model is usually implemented as a database. Data is viewed as a resource to be shared by as many processes as possible. As a result, data must be organized in a way that is flexible and adaptable to unanticipated business requirements – and that is the purpose of data modeling. In this milestone, you will first discover those entities in the system that are or might be described by data. Then you will define each entity you identify in respect to the business in an Entity Definition Matrix. Then you will do the data model tutorial in doc sharing that will prepare you for doing the Fully-Attributed ERD for ECS. Objectives After completing this milestone, you should be able to: Understand and perform the techniques for entity discovery. Define each entity with respect to the business and complete an entity definition matrix. Perform the necessary data modeling techniques to organize and document the data requirements for the proposed system. Construct the Fully Attributed data models. Prerequisites Before starting this milestone, the following topics should be covered: Data modeling — Chapter 8 Milestone 1-3 Solutions (provided by your instructor)
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Week 4: Milestone 4, Part I Description CIS321_W4_iLab_Milestone_4_PartI_Description .docx Page 2 Assignment Now that we have studied the current system and analyzed some of its problems and opportunities, plus gained approval to proceed, we can now start to identify the business data requirements and graphically model them. In this assignment, we will use our results of the previous milestones, samples of forms we have collected, and a copy of a transcript of an interview with Dan Stantz’s staff. The results of this activity will identify the business data requirements for the proposed system. Activities 1. Complete an Entity Definition Matrix. Analyze each of the forms referenced by the user interview and make assumptions where necessary. (Note: While it is appropriate to make assumptions, you should document those assumptions and include them in your submission to your instructor.) If you create the matrix in Excel, paste it into a Word document prior to submission. 2.
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This note was uploaded on 07/31/2011 for the course CIS 321 taught by Professor Comptonw during the Spring '10 term at DeVry Chicago.

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cis321_w4_ilab_milestone_4_parti_description - Week 4:...

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