DNSC-SAD 2018: Chapter 9

CASE STUDY Personal Trainer, Inc. Personal Trainer, Inc., owns and operates fitness centers in a dozen Midwestern cities. The centers have done well, and the company is planning an international expansion by opening a new “supercenter” in the Toronto area. Personal Trainer’s president, Cassia Umi, hired an IT consultant, Susan Park, to help develop an information system for the new facility. During the project, Susan will work closely with Gray Lewis, who will manage the new operation. Background:   After evaluating various development strategies, Susan prepared a system requirements document and submitted her recommendations to Cassia Umi, Personal Trainer’s president. During her presentation, Susan discussed several development strategies, including in-house development and outsourcing. She did not feel that a commercial software package would meet Personal Trainer’s needs. Based on her research, Susan felt it would be premature to select a development strategy at t...

CASE STUDY New Century Health Clinic New Century Health Clinic offers preventive medicine and traditional medical care. In your role as an IT consultant, you will help New Century develop a new information system. Background:   After completing the user interface, input, and output design for the new information system at New Century, you will consider data design issues. Begin by studying the DFDs and object-oriented diagrams you prepared previously and the rest of the documentation from the systems analysis phase. Perform the following tasks: Assignments 1. Create an initial entity-relationship diagram for the New Century Health Clinic system. 2. Normalize your table designs. 3. If you identified any new entities during normalization, create a final entity-relationship diagram for the system.  4. Write a memo for your documentation file that contains your recommendation about whether a file processing or a database environm...

Western Wear Outfitters Situation:   Western Wear is a mail-order firm that offers an extensive selection of casual clothing for men and women. Western Wear plans to launch a new Web site, and the company wants to develop a new set of product codes. Currently, 650 different products exist, with the possibility of adding more in the future. Many products come in various sizes, styles, and colors. The marketing manager asked you to develop an individualized product code that can identify a specific item and its characteristics. Your initial reaction is that it can be done, but the code might be fairly complex. Back in your office, you give the matter some thought. 1.        Design a code scheme that will meet the marketing manager’s stated requirements. Some firms use a straight numeric sequence code, because it is simple and can be assigned automatically by the system. Other firms choose a significant digit code that indicat...

Mayville Public Library  Situation:  Mayville is a rural village with a population of 900. Until now, Mayville was served by a bookmobile from a larger town. The Mayville Village Council has authorized funds for a small public library, and you have volunteered to set up an information system for the library. Assume that the library will have multiple copies of certain books. 1. Draw an ERD for the Mayville library system. 2. Indicate cardinality. 3. Identify all fields you plan to include in the tables. Students should be imaginative and suggest field attributes that would  be appropriate and typical in a library information system that Mayville Public Library would use. 4. Create 3NF table designs.