Understanding SDLC Models and System Analysis Techniques

Define SDLC models? What are the most known SDLC model?

An SDLC model defines implementation of an approach to the project. It defines the various processes, and phases that would be carried out throughout the project to produce the desired output. There are a variety of SDLC models that exist catering to different needs and characteristics of a project. Some are of iterative nature (Prototyping), whereas some are sequential (waterfall).

Some of the well-known SDLC models are:
Waterfall model, Software prototyping, Rapid application development,

Extreme programming, and End user development. 

List Advantages of using system analysis and design techniques in approaching computerized info system?

• Identifies and solves the right problems
• Implement improvements in support of users and
• Cuts down on dissatisfaction and prevents disuse of systems
• Gives structure of the analysis and design of information systems
• Cuts down on costly and haphazard endeavors
• Improves a business with CIS

Another answer:System analysis and design techniques

provide the analyst with a systematic procedure for analyzing data input, data flow, and information output; furthermore, the techniques can improve the functioning of business.

Here are five questions written by one of your

systems analysis team members. Her interviewee is

the local manager of LOWCO(company name),  an

outlet of a national discount chain, who has asked

you to work on a management information system to

provide inventoryinformation. Review these

 questions for your team member.

1. When was the last time you thought seriously about your decision making process?

2. Who are the troublemakers in your store, I mean

 the ones who will show the most resistance to

 changes in the system that I have proposed?
3. Are there any decisions you need more

 information about to make them?

4. You don't have any major problems with the

current inventory control system, do you?

5. Tell me a little about the output you'd like to see.

a. Rewrite each question to be more effective in giving information.

1.Describe key decisions you are responsible for?

2.How well do your employees accept changes in the system?

3.Is the current system providing you with enough information to help you makedecisions?

4.Do you have any problems with your current system?

5.What kind of output would you like to see? What type of format is preferred?

(It would be good to have a current form on hand to discuss.)

b. Order the questions in a pyramid, funnel, or

diamond-shaped structure, and label the questions

with the name of the structure used.

The order of questions in a diamond-shaped

 structure: Q3Q1Q4Q2Q5.

.A. Why is labeling data flow diagrams so important?

    B. What can effective levels of data flow diagrams accomplish for those who are unfamiliar with the system?

A. DFDs are an important technique for modeling a system’s high-level detail by showing how input data is transformed to output results through a sequence of functional transformations.

B. It makes them more communicative by helping someone that is new to the system understand its objectives, functions, and features.

The pictures question

One common experience that students in every

 college and university share enrolling in a college

course.

A. Draw a level one data flow diagram of data

 movements for enrollment in a college course?

B. Analyze one of the processes in your original data

flow diagram into sub processes, adding data flows

 and data stores.