Category Archives: CIS 321 (Devry)

CIS 321 Week 4 Milestone 4 Part 1

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DATA MADELING Part I (Logical ERD)

The requirements analysis phase answers the question, What does the user need and want from a updated system The requirements analysis phase is critical to the success of any updated 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 updated 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).

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 Context data model (Logical ERD).

Prerequisites

Before starting this milestone, the following topics should be covered:

Data modeling Chapters 8 and 14.

Milestone 1-3 Solutions (provided by your instructor)

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 the preliminary data analysis provided below. 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 from the previous milestone and the preliminary data analysis provided below 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. Complete the Visio tutorial which walks you through how to create an Entity Relationship Diagram (ERD), located in Doc Sharing.

When you have completed the tutorial, paste the diagram you have created to the end of the Word document that already holds your Entity Definition Matrix.

3. Prepare a Context Data Model.

Deliverable format and software to be used are according to your instructor s specifications. Deliverables should be neatly packaged in a binder, separated with a tab divider labeled Milestone 4-Part I .

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CIS 321 Week 3 Milestone 3

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PROCESS MODELING- Part I Synopsis

The requirements analysis phase answers the question, “What does the user need and want from a updated system?” The requirements analysis phase is critical to the success of any updated information system! In this milestone we need to identify what information systems requirements need to be defined from the system users’ perspectives.

The Data flow diagram (DFD) has gained popularity as a technique for expressing system requirements for two reasons:

• It facilitates development, which often leads to building systems that better   satisfy user needs

• Data flow diagrams and narratives are easy for users to understand.

In this milestone you will first uncover external agents, processes and data flows that define the requirements for the proposed system and document that information. You will use that to build the Context Data Flow Diagrams.

Objectives

After completing this milestone, you should be able to:

• Understand and perform the techniques for requirements discovery.

• Determine external agents (external entities) and their relationship with the

 System, identify data   flows.

• Construct the Context DFD using VISIO.

Prerequisites

Before starting this milestone, the following topics should be covered:

• The problem analysis phase — Chapters 3 and 5

• PIECES framework — Chapters 3 and 5

• Problem analysis techniques — Chapter 6

• Process modeling techniques — Chapter 9

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 requirements for the system and model them. In this assignment we will use our results of the previous Milestone. The results of this activity will identify the system requirements for the proposed system.

Refer to sample forms (below), and results from Milestones 1 and 2 for the information necessary to complete the activities.

Activities

1.         Identify External entities and relationship with system

2.         Identify data flows

3.         Prepare Context level Data Flow Diagram

Deliverable format and software to be used are according to your instructor’s specifications. Deliverables should be neatly packaged in a binder, separated with a tab divider labeled “Milestone 3”.

References

• Transcripts of Interview – Exhibit 3.1 (see below)

Deliverables:

Context level DFD:                                                                   Due:  __/__/__

                                                                                                     Time: _______

         ADVANCED OPTION

For the advanced option, compile the process description to note processes’ input and output.

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CIS 321 Week 1 Milestone 1

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In this milestone, you will prepare a Request for System Services Form, which is the trigger for the Preliminary Investigation Phase. Also, you will use fact-finding techniques to extract and analyze information from an interview to determine project scope, level of management commitment, and project feasibility for the Equipment Check-Out System (ECS). With these facts and facts obtained from the Case Background, you will have the necessary information to complete the Problem Statement Matrix. Refer to the ECS Case Introduction in the Case Project page.

Objectives

After completing this milestone, you should be able to:

• Complete a Request for System Services form, which triggers the preliminary investigation phase.

• Analyze a user interview and extract pertinent facts, which can be used to assess project feasibility.

• Complete a “Problem Statement Matrix documenting the problems, opportunities, or directives of the project.

Prerequisites

Before starting this milestone, the following topics should be covered:

• The scope definition phase — Chapters 3 and 5

• Project management (optional) — Chapter 4

Assignment

The Maintenance Department receives computing support from the GB Manufacturing Information Systems Services Department (ISS). You are to assume that you work as a systems analyst with ISS.


You have been asked by Dan Stantz to analyze and design the Equipment Depot system to manage equipment check-in and check-out. In this assignment you first need to assist Dan Stantz in preparing a “Request for Systems Services.” Secondly, by analyzing the interview transcripts, you will determine the feasibility of the project, level of management commitment, and project scope by using fact-finding techniques and the necessary communication skills to compose the “Problem Statement Matrix.”

Mr. Stantz was gracious enough to allow us to record our interview session, and Exhibit 1.1 is a copy of the transcripts. Refer to the “Case Background” above and to the interview transcript in Exhibit 1.1 for the information necessary to complete the following activities.

Activities

1.    To complete the Request for System Services Form, use information from the case background. Make assumptions where necessary.

2.    To complete the Problem Statement Matrix Form, use the interview with Dan Stantz and the case background for the basis of your information. Make assumptions where necessary. Place yourself in the shoes of Mr. Stantz. Which problems do you believe have the highest visibility, and how should they be ranked? Try to determine the annual benefits. State assumptions and be prepared to justify your answers! Finally, what would be your proposed solution based on the facts you know now?

Deliverable format and software to be used are according to your instructor’s specifications. Deliverables should be neatly packaged in a binder, separated with a tab divider labeled “Milestone 1”.

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CIS 321 iLab 7

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Primitive Diagram for the Check-Out Equipment Event Structured English (pseudocode) for the Check Equipment Event Validate Employee elementary processes Data Structure Design (see figure 9-10) for data input and data output for the Validate Employee elementary process

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