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System Analysis and Design

Written By Basith on Sunday, June 8, 2014 | 11:44 PM


1)     What is a requirement gathering?
ý Requirements analysis in systems engineering and software engineering, encompasses those tasks that go into determining the needs or conditions to meet for a new or altered product, taking account of the possibly conflicting requirements of the various stakeholders, analyzing, documenting



2)     Whatis a fact finding technique?
ý To study any system the analyst needs to do collect facts and all relevant information. the facts when expressed in quantitative form are termed as data. The success of any project is depended upon the accuracy of available data. Accurate information can be collected with help of certain methods/ techniques. These specific methods for finding information of the system are termed as fact finding techniques. Interview, Questionnaire, Record View and Observations are the different fact finding techniques used by the analyst. The analyst may use more than one technique for investigation.

Interview
Ø  This method is used to collect the information from groups or individuals. Analyst selects the people who are related with the system for the interview. In this method the analyst sits face to face with the people and records their responses. The interviewer must plan in advance the type of questions he/ she is going to ask and should be ready to answer any type of question. He should also choose a suitable place and time which will be comfortable for the respondent.

Questionnaire
Ø  It is the technique used to extract information from number of people. This method can be adopted and used only by an skillful analyst. The Questionnaire consists of series of questions framed together in logical manner. The questions are simple, clear and to the point. This method is very useful for attaining information from people who are concerned with the usage of the system and who are living in different countries. The questionnaire can be mailed or send to people by post. This is the cheapest source of fact finding.

Record View
Ø  The information related to the system is published in the sources like newspapers, magazines, journals, documents etc. This record review helps the analyst to get valuable information about the system and the organization.

Observation
Ø  Unlike the other fact finding techniques, in this method the analyst himself visits the organization and observes and understand the flow of documents, working of the existing system, the users of the system etc. For this method to be adopted it takes an analyst to perform this job as he knows which points should be noticed and highlighted. In analyst may observe the unwanted things as well and simply cause delay in the development of the new system.

3)    Describes fact finding technique? And write advantage, disadvantage

v Interview 
Advantages of the interview method
1.   Very good technique for getting the information about the complex, emotionally laden subjects.
2.   Can be easily adapted to the ability of the person being interviewed.
3.   Yields a good percentage of returns.
4.   Yields perfect sample of the general population.
5.   Data collected by this method is likely to be more correct compared to the other methods that are used for the data collection.

Disadvantages of the interview method
1. Time consuming process.
2. Involves high cost.
3.Requires highly skilled interviewer.
4. Requires more energy.
5. May sometimes involve systematic errors.
6. More confusing and a very complicated method.

v Questionnaire
The advantages of questionnaires

1.       Large amounts of information can be collected from a large number of people in a short period of time and in a relatively cost effective way.
2.       Can be carried out by the researcher or by any number of people with limited affect to its validity and reliability.
3.       The results of the questionnaires can usually be quickly and easily quantified by either a researcher or through the use of a software package.
4.       Can be analyzed more 'scientifically' and objectively than other forms of research.
5.       When data has been quantified, it can be used to compare and contrast other research and may be used to measure change.

The disadvantages of questionnaires
1.       Is argued to be inadequate to understand some forms of information - i.e. changes of emotions, behavior, feelings etc.
2.       Phenomenologists state that quantitative research is simply an artificial creation by the researcher, as it is asking only a limited amount of information without explanation
Lacks validity
3.       There is no way to tell how truthful a respondent is being
4.       There is no way of telling how much thought a respondent has put inThe respondent may be forgetful or not thinking within the full context of the situationPeople may read differently into each question and therefore reply based on their own interpretation of the question - i.e.
5.       what is 'good' to someone may be 'poor' to someone else, therefore there is a level of subjectivity that is not acknowledgedThere is a level of researcher imposition, meaning that when developing the questionnaire, the researcher is making their own decisions andassumptions as to what is and is not important...therefore they may be missing something that is of importance
v  Record View
Advantages
provide accurate records of the agency’s contact with the client and aid in continuity of case management between co-workers
aid/jog memory as over time it can be difficult to recall the specifics of each case
lend credibility - particularly if one is called to give evidence of a particular fact or matter may add credence to a claim by a client - especially about sexual abuse or domestic violence incidents protect the worker and the agency, particularly from later claims of negligence.

Disadvantages
non-privileged records may be used against the client (e.g. in court cases)
if it exists, file notes may disclose negligence on the part of the worker
clients may be loathe to seek assistance if they know that an agency maintains records which they fear may later be used against them or which they fear somehow may end up in the hands of a violent spouse or government agency.

v  Site observations
Advantages of Observation
1.     Very direct method for collecting data or information – best for the study of human behavior.
2.     Data collected is very accurate in nature and also very reliable.
3.     Improves precision of the research results.
4.     Problem of depending on respondents is decreased.
5.     Helps in understanding the verbal response more efficiently.
6.     By using good and modern gadgets – observations can be made continuously and also for a larger duration of time period.

Disadvantages of Observation
1.   Problems of the past cannot be studied by means of observation.
2.   Having no other option one has to depend on the documents available.
3.   Observations like the controlled observations require some especial instruments or tools for effective working, which are very much costly.
4.   One cannot study opinions by this means.
5.   Attitudes cannot be studied with the help of observations.
6.   Sampling cannot be brought into use.




v  Sampling of Existing documents
Advantages
1. Access to inaccessible subjects: One of the basic advantages of content analysis is that it allows
research on subjects to which the researcher does not have physical access. These could be people of
old civilizations, say their marriage patterns. These could also be the documents form the archives,
speeches of the past leaders (Quaid-e-Azam) who are not alive, the suicide notes, old films, dramas,
2. Non-reactivity: Document study shares with certain types of observations
or non participant observation through one-way mirror) the advantage of little or no reactivity,
particularly when the document was written for some other purpose. This is unobtrusive. Even the
creator of that document, and for that matter the characters in the document, is not in contact with the
researcher, who may not be alive.
3. Can do longitudinal analysis: Like observation and unlike experiments and survey, document
study is especially well suited to study over a long period of time. Many times the objective of the
research could be to determine a trend. One could pick up different periods in past and try to make
comparisons and figure out the changes (in the status of women) that may have occurred over time.
4. Use Sampling: The researcher can use random sampling. One could decide on the population,
develop sampling frame and draw sample random sample by following the appropriate procedure. For
example how women are portrayed in weekly English news magazines. One could pick up weekly
English news magazines, make a listing of articles that have appeared in the magazines (sampling
frame), and draw a simple random sample.
5.  Can use large sample size:  Larger the sample closer the results to the population.  In
experimentation as well as in survey research there could be limitations due to the availability of the
subjects or of the resources but in document analysis the researcher could increase the sample and can
have more confidence in generalization. 

Disadvantages

1. Coding difficulties: For a number of reasons, including differences in purpose for which thedocuments were written, differences in content or subject matter, lack of standardization, anddifferences in length and format, coding is one of the most difficult tasks facing the content analyst.Documents are generally written arrangements, rather than numbers are quite difficult to quantify. Thusanalysis of documents is similar to analysis of open-ended survey questions.
2. Selective survival: Since documents are usually written on paper, they do not withstand the elementswell unless care is taken to preserve them.Thus while documents written by famous people are likelyto be preserved, day-to-day documents such as letters and diaries written by common people tend eitherto be destroyed or to be placed in storage and thus become inaccessible.

3. Incompleteness: Many documents provide incomplete account to the researcher who has had no
prior experience with or knowledge of the events or behavior discussed. A problem with many personal
documents such as letters and diaries is that they were not written for research purposes but were
designed to be private or even secret. Both these kinds of documents often assume specific knowledge
that researcher unfamiliar with certain events will not possess. 
4. Lack of availability of documents: In addition to thee bias, incompleteness, and selective survival of
documents, there are many areas of study for which no documents are available. In many cases
information simply was never recorded. In other cases it was recorded, but the documents remain secret
or classified, or have been destroyed.
5. Sampling bias: One of the problems of bias occurs because persons of lower educational or income
levels are less likely to be represented in the sampling frames. The problem of sampling bias by
educational level is more acute for document study than for survey research. It is a safe generalization
that a poorly educated people are much less likely than well educated people to write documents.


4)        Why we need requirements gathering and fact finding technique?

ý   Requirements gathering techniques provide project team members with a choice of methods for eliciting needs or requirements from stakeholders and for validating requirements with stakeholders.  Certain techniques are appropriate in gathering stakeholder needs, while other techniques are most helpful in defining high-level and detailed requirements, or validating detailed requirements with the stakeholders

Fact-finding is the job of a person or group of persons in a judicial or administrative proceeding that has or has the responsibility of determining the facts relevant to decide a controversy. The term trier of fact generally denotes the same function. The process is an extremely important part of the communication process.
5)     What is FEASIBILITY analysis?

ý  A feasibility study is an evaluation and analysis of the potential of the proposed project which is based on extensive investigation and research to support the process of decision making.



6)     What is Brainstorming?

ý   hold a group discussion to produce ideas.

ý  Brainstorming is the name given to a situation when a group of people meet to generate new ideas around a specific area of interest. Using rules which remove inhibitions, people are able to think more freely and move into new areas of thought and so create numerous new ideas and solutions. The participants shout out ideas as they occur to them and then build on the ideas raised by others. All the ideas are noted down and are not criticized. Only when the brainstorming session is over are the ideas evaluated.



7)     What areFact-Finding Strategy?

ý   The first step in the strategic planning process is gathering in all of the relevant facts and information.  Dont panic, this is not a questionnaire you need to fill out, but it is a sample of what you will be asked so please take the time to read through it to identify any areas that you might need some preparation (fact finding, statistics, documents, phone calls or emails) for before answering the questions reasonably accurately.  Dont worry unduly about not having any data or answers in a particular area, few people know have of this stuff, were just trying to learn as much as possible about your organization in as little time as possible and yes, it is all relevant and of course it will never be shared with anyone else.



8)     Requirements Management?

ý   Requirements management is the process of documenting, analyzing, tracing, prioritizing and agreeing on requirements and then controlling change and communicating to relevant stakeholders. It is a continuous process throughout a project. A requirement is a capability to which a project outcome (product or service) should conform.


9)     How to Developing a Questionnaire?
ý   Wouldn’t it be great to know exactly what your clients want and need from you? If you are like most Pilates studio owners, you probably can’t invest a lot of money in complex statistical computer models or market research to gather data about your clientele. However, you should still collect this information on your own. For gathering data about your customers and their programming needs, there are many vehicles, including focus groups, experimental research or questionnaires.
ý   This article focuses on how to develop a questionnaire or survey. This simple tool can help you learn more about your clients’ needs, preferences, satisfaction levels and knowledge of your services. The responses will reflect the ever-changing feelings and needs of people who are constantly influenced by many subjective factors. Therefore, it is important to gather facts in an organized manner with specific goals in mind.
ý   Understanding what your customers need will help you create offerings that are both attractive and valued. Conducting surveys will reduce programming missteps based on poor assumptions; most likely, you will also discover new opportunities.

Designing Questionnaires
1.    Include clear instructions for answering all questions.
2.    Use brief, simple questions.
3.    Begin with general questions, and then move toward more specific questions.
4.    Check the questions for “ease of reading,” and correct any grammatical errors.
5.    Have a friend read the entire questionnaire to double-check for errors and readability.


10)   List out Types of Interviews.

ý   Whether you are preparing to interview for a summer job, graduate school, or a full-time position after graduation, you will likely experience a variety of interview styles and formats.  Depending on what you are applying for you may have just one interview or experience multiple interviews during the interview process.  If your interview process is made up of more than one interview, you will almost certainly be exposed to multiple interview types, formats, and questions.

interview Types




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