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DEVRY CIS 321 Week 4 Milestone 4 Part 1 Check this A+ tutorial guideline at For.

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Presentation on theme: "DEVRY CIS 321 Week 4 Milestone 4 Part 1 Check this A+ tutorial guideline at For."— Presentation transcript:

1 DEVRY CIS 321 Week 4 Milestone 4 Part 1 Check this A+ tutorial guideline at http://www.assignmentcloud.com/cis-321/cis-321-week-5-milsestone-4-part-2 For more classes visit http://www.assignmentcloud.com DATA MADELING Part I (Logical ERD) 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 logical entity relational diagram (ERD).

2 O BJECTIVES A FTER COMPLETING THIS MILESTONE, YOU SHOULD BE ABLE TO : U NDERSTAND AND PERFORM THE TECHNIQUES FOR ENTITY DISCOVERY. D EFINE EACH ENTITY WITH RESPECT TO THE BUSINESS AND COMPLETE AN ENTITY DEFINITION MATRIX. P ERFORM THE NECESSARY DATA MODELING TECHNIQUES TO ORGANIZE AND DOCUMENT THE DATA REQUIREMENTS FOR THE PROPOSED SYSTEM. C ONSTRUCT THE C ONTEXT DATA MODEL (L OGICAL ERD). P REREQUISITES B EFORE STARTING THIS MILESTONE, THE FOLLOWING TOPICS SHOULD BE COVERED : D ATA MODELING C HAPTERS 8 AND 14. M ILESTONE 1-3 S OLUTIONS ( PROVIDED BY YOUR INSTRUCTOR ) A SSIGNMENT N OW 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. I N THIS ASSIGNMENT, WE WILL USE OUR RESULTS OF THE PREVIOUS MILESTONES, SAMPLES OF FORMS WE HAVE COLLECTED AND THE PRELIMINARY DATA ANALYSIS PROVIDED BELOW. T HE RESULTS OF THIS ACTIVITY WILL IDENTIFY THE BUSINESS DATA REQUIREMENTS FOR THE PROPOSED SYSTEM. A CTIVITIES 1. C OMPLETE AN E NTITY D EFINITION M ATRIX. A NALYZE EACH OF THE FORMS FROM THE PREVIOUS MILESTONE AND THE PRELIMINARY DATA ANALYSIS PROVIDED BELOW AND MAKE ASSUMPTIONS WHERE NECESSARY. (N OTE : W HILE IT IS APPROPRIATE TO MAKE ASSUMPTIONS, YOU SHOULD DOCUMENT THOSE ASSUMPTIONS AND INCLUDE THEM IN YOUR SUBMISSION TO YOUR INSTRUCTOR.) I F YOU CREATE THE MATRIX IN E XCEL, PASTE IT INTO A W ORD DOCUMENT PRIOR TO SUBMISSION.

3 2. C OMPLETE THE V ISIO TUTORIAL WHICH WALKS YOU THROUGH HOW TO CREATE AN E NTITY R ELATIONSHIP D IAGRAM (ERD), LOCATED IN D OC S HARING. W HEN YOU HAVE COMPLETED THE TUTORIAL, PASTE THE DIAGRAM YOU HAVE CREATED TO THE END OF THE W ORD DOCUMENT THAT ALREADY HOLDS YOUR E NTITY D EFINITION M ATRIX. 3. P REPARE A C ONTEXT D ATA M ODEL. D ELIVERABLE FORMAT AND SOFTWARE TO BE USED ARE ACCORDING TO YOUR INSTRUCTOR S SPECIFICATIONS. D ELIVERABLES SHOULD BE NEATLY PACKAGED IN A BINDER, SEPARATED WITH A TAB DIVIDER LABELED M ILESTONE 4-P ART I.


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