Systems analysts use CASE tools to help them plan, build. and maintain information systems. To learn more

about CASE tools. tum to Part B of the Toolkit that follows Chapter 12. You can complete these tasks with the

Visible Analyst CASE tool, which is available with this textbook, or a similar tool.

Background

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You decided to start a mobile auto detailing service that will visit customers at their homes or businesses, and

use traditional, high-quality hand washing and waxing methods. In addition to retail customers, several auto

dealers have expressed interest in your services, and you are eager to get started. You plan to hire college stu

dents as technicians, train and supply them, and offer them a share of the profits as an incentive.

Your friend, who is an IT major, offered to help you set up an information system by customizing several

Microsoft Office applications to meet your needs. She suggested that you prepare an initial context diagram

and a DFD diagram 0, and not to be too concerned about the details - just the main entities, data flows, and

data stores. Thinking it over, you know that you will have employees, retail customers, auto dealer accounts,

one or more suppliers, and your local bank, where you plan to set up a business checking account to handle

the business. You also plan to keep track of customers, employee information, profit-sharing data, and an op

erations log, among other things.

Tasks

1. Create a context diagram from the new business. It is okay to use your imagination with respect to data

flows that you envision.

2. Create a diagram 0 that includes at least three processes and two data stores that would be typical in a

small business of this kind. You can use your imagination with respect to the processes and data stores

that might be needed.