I’m in a desperate pinch and need some help. I need several questions answered s
ID: 3623885 • Letter: I
Question
I’m in a desperate pinch and need some help. I need several questions answered swiftly. I need the first within 12 hours, and the others NLT Thursday. Questions need to be 50-100 words for each subsection. Questions to follow:1.Tangible Investments Corporation
Situation: Tangible Investments Corporation needs a new customer billing system. As project leader, you decided to create a prototype that users can evaluate before the final design is implemented. You plan to use a traditional structured analysis methodology. To prepare for your meeting with top management tomorrow, you need to review the following topics.
1. Explain the main purpose of prototyping.
2. Explain why a prototype might or might not evolve into the final version of the system.
3. Describe the tools typically used in developing prototypes.
4. List three advantages and three disadvantages of prototyping.
2. Sky-High Internet Services Situation: Sky-High Internet Services is a leading Internet service provider in a metropolitan area. The new customer billing system has caused an increase in complaints. Tammy Jones, the office manager, asked you to investigate the situation. After interviewing data entry operators and observing the online data input process, you are fairly certain that most errors occur when data is entered.
a. Write a brief memo to Tammy explaining the importance of data validation during the input process.
b. Suggest at least three specific data validation checks that might help reduce input errors.
c. Would a batch input system offer any advantages? Write a brief memo to Tammy stating your views.
d. Suppose that Sky-High is predicting 25 percent annual growth, on a current base of 90,000 customers. If the growth pattern holds, how many customers will Sky-High have in three years? If it takes about 12 minutes to enter a new customer into the system, how many additional data entry operators will be needed to handle the growth next year? Assume that an operator works about 2,000 hours per year. Also assume a 30 percent annual attrition rate for existing customers.
3. Puppy Palace
Situation: Puppy Palace works with TV and movie producers who need dogs that can perform special tricks, such as headstands, somersaults, ladder climbs, and various dog-and-pony tricks. Puppy Palace has about 16 dogs and a list of 50 tricks from which to choose. Each dog can perform one or more tricks, and many tricks can be performed by more than one dog. When a dog learns a new trick, the trainer assigns a skill level. Some customers insist on using dogs that score a 10, which is the highest skill level.
As an IT consultant, you have been asked to suggest 3NF table designs. You are fairly certain that a M:N relationship exists between dogs and tricks.
1. Draw an ERD for the Puppy Palace information system.
2. Indicate cardinality.
3. Identify all fields you plan to include in the tables. For example, in the dogs table, you might want breed, size, age, name, and so on. In the tricks table, you might want the trick name and description. You will need to assign a primary key in each table. Hint: Before you begin, review some database design samples in this chapter. You might spot a similar situation that requires an associative entity that you can use as a pattern. In addition, remember that numeric values work well in primary key fields.
4. Create 3NF table designs.
4. After three years as a successful web design firm in Southern California, Digital Dynamics has decided to add two new business ventures: a group that specializes in supplying qualified employees to high-tech firms and a training division that offers online courses in advanced web design and e-commerce skills. As a senior systems analyst, you have been asked to study the situation and make recommendations.
1. Should Digital Dynamics adopt ERP? What specific advantages would ERP offer?
2. How could the concept of supply chain management apply to a company’s service- based division? Provide some specific suggestions.
3. Should Digital Dynamics use separate portals for employees, customers, and suppliers? If you follow the example of Oracle Corporation in the textbook, what type of portal design would you suggest?
4. Is the experience of other companies relevant? Use the Internet to locate examples of Web-based firms that offer personnel services and technical training. How would you evaluate the Web sites you visited? What specific features impressed you favorably or unfavorably?
5. Sand and Surf Retailers
Situation: Sand and Surf Retailers recently acquired several smaller companies to expand its chain of clothing outlets. To establish consistency for the current organization and future acquisitions, Sand and Surf decided to develop an in-house application called SPS (Standard Purchasing System). The SPS system would standardize purchasing practices for each Sand and Surf subsidiary and manage all purchasing information. System testing will be completed by the end of the week.
1. What types of documentation are needed for this application?
2. During application development, what steps should the IT staff follow to develop a structure chart?
3. What suggestions do you have for Help screens and online tutorials?
4. What types of testing should be performed? What types of test data should be used?
Explanation / Answer
Purpose of Prototyping:
Tangible Investment Corporation is a prototype fast constructed proposed system. Prototyping requires identifying the model accuracy, correctness or robustness, its inputs & outputs and interfaces etc. Users can check the model and decide that is it sufficient or need changes. Sometimes users can decide that prototype is the final information system.
In Prototyping we have worked some how the other one basic version of the system.
Few prototypes will discard after the final design. It can show the basic idea to users.
Prototyping might or might not involve into the system:
Here involves two types of prototyping one is system prototyping another is design prototyping
The end product of system prototyping is complete future analysis information model system, when it implements it ready for the system.
Designers are involves to verify the user requirements and requests satisfies then called design prototyping. Here the prototyping involves restricted but not less important. Here middle of the designing, users will involve. User will tell their respective requests to designers accordingly designers will design the system. It is possible to capture the user input, output and interfaces.
Tools used for prototypes:
CASE tools, application generators, report generators, screen generators and Generation languages. Combination of these tools provides frame-work for fast software development called fourth-generation development.
Systems analysts use CASE tools to create series of diagrams and definitions these are generate data dictionary automatically.
Application generators are developing computer programs by translated to logical model directly to fourth generation language code.
Report generators used to design format reports speedy and review also done.
Screen generators can help you design a norm interface, create screen figure, and handle data entry format and procedures.
Advantages & Disadvantages of prototyping:
Advantages:
Reduces risk
For final system it can give better idea on finance expenses
Avoid misunderstandings
Through prototypes we can analyze in better way for procedures and processes
Disadvantages:
When complex designing systems, prototype becomes difficult to manage and maintain
When it get operational, find out few quality issues
Through prototype we cannot correctly evaluate all systems performances
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