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Case 4-7 Application Architecture

Case 4-7 Application Architecture

Case 4-7 Application Architecture

MILESTONE 7 – APPLICATION ARCHITECTURE

Synopsis

J

ust as you modeled business requirements during systems analysis, you should

model technology architecture and requirements during systems design. The

models serve as blueprints for system design, prototyping and construction.

In this milestone, you will prepare a Physical Data Flow Diagram. Physical data flow diagrams model the technical and human design decisions to be implemented as part of an information system. They communicate technical and other design constraints to those who will actually implement the system. In other words, they serve as a technical blueprint for the implementation.

Objectives

After completing this milestone, you should be able to:

Draw physical data flow diagrams for an i nformation system’s architecture and processes.

Prerequisites

Before starting this milestone the following topics should be covered:

1.Systems design – Chapter 10

2.Application architecture and physical DFDs – Chapter 11

Assignment

The goal of this project is to produce a high-level general design that can serve as an application architecture for the system and a general design for the processes that make up the system.

Activities

1.Prepare the physical DFD based on the narrative provided in Exhibit 7.1. Make

assumptions where necessary.

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 7,” and accompanied with a Milestone Evaluation Sheet.

References:

Export Production Information Narrative

Exhibit 7.1

Templates

See online learning center web site for the textbook.

Deliverables:

Physical Data Flow Diagram: Due: __/__/__

Time:_______ Milestone’s Point Valu e: _______

Exhibit 7.1

Add New Request Narrative

To add a service request, a technology user will launch a web browser and go to

the URL of the Active Server Page containing the service request form. The

Active Server Page will use info from the Equipment data store to load a combo

box on the form so that the user must select a valid Equipment ID. The user will enter the rest of the service request information including the user’s name and a

description of the problem.

Clicking the Submit button will launch the Active Server Page that adds the new service request. It will issue an SQL INSERT command to the Service Request

data store. The Report Date will be automatically filled in with the current system date from the operating system. The system will trigger an e-mail message to be

sent to the IT Director with notification of the new service request. The system

will also send a confirmation page to the technology user’s browser.

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