Quiz 1 (REDO) System Requirements Specification

Question 1

The Heart of the process

Answer 1

Analysis

Question 2

Several tools of structured analysis:

Answer 2

1. Data Flow Diagram
2. Data Dictionary
3. Structured English
4. Decision Trees
5. Decision Tables

Question 3

Is about understanding the situations, not solving the problems.

Answer 3

System Analysis

Question 4

Effective analyst therefor emphasize imvestigation and questioning to learn how a system currently operates and to identify the requirements user have for a new or modified one.

Answer 4

Systen Analysis

Question 5

Involves studying the current business system to find out how it works and where improvement should be made.

Answer 5

Requirement Determination

Question 6

Is a feature that must be included in the new system. It may include the way of capturing or processing data, producing information, controlling a business activity, or supporting management.

Answer 6

Requirements

Question 7

Three Major Activities of Requirement determination:

Answer 7

1. Requirement Anticipation
2. Requirement Investigation
3. Requirement Specification

Question 8

Involves using past experience in a specific business area or similar environments to influence a system analyst’s study. This can help foresee potential problems or features needed for a nee system.

Answer 8

Requirement anticipation

Question 9

This activity is at the heart of system analysis.

Answer 9

Requirement investigation

Question 10

It involves the using various tools and skills used by analysts to study the current system and document its features for further analysis

Answer 10

Requirement investigation

Question 11

It relies on fact-finding techniques and includes methods for documenting and describing system features

Answer 11

Requirement investigation

Question 12

The data produce during fact-finding investigation are analyzed to determine requirements specification and the description of features for a new system.

Answer 12

Requirement Specification

Question 13

Requirement Specification:

Three interrelated parts:

Answer 13

1. Analysis of Factual data
2. identification of essential requirements
3. Selection of requirements fulfillment strategies.

Question 14

The data collected during fact-finding study and included in data flow and decision analysis documentation are examined to determine how well the system is performing and whether it will meet the organization’s demands.

Answer 14

Analysis of factual data

Question 15

Features that must be included in a new system, ranging from operational details to performancd criteria, are specified.

Answer 15

Identification of essential requirements

Question 16

The method will be used to achieve a stated requirements are selected. These form the basis for system design, which follows requirement specifications.

Answer 16

Selection of requirement fulfillment strategies.

Question 17

• Begin with the basics
• Analyst must raise questions that, when answered, will provide a background of fundamental details about the system and describe it.

Answer 17

Understand the Process

Question 18

-Analyst needs to find out what data are used to perform each activity.
-Most Business transaction also produce information

Answer 18

Identify data used and information produced

Question 19

-Frequency of business activities varies greatly.

-therefore, analyst should learn how often the activity is repeated

Answer 19

Determine process timing and volume

Question 20

The weak or missing control area is an important discovery in any system investigation.

Answer 20

Identify control

Question 21

User Transaction Requirements;

TPS System:

Answer 21

Capture - Process - Store Data (for a reason)

Question 22

• Decision unlike transaction activities, may not follow a specific procedure.
• Decision systems may focus on the past, the present or the future.

Answer 22

User Decision Requirements

Question 23

It refers to the specific methods analysts use for collecting data about requirements.

Answer 23

Fact-Finding techniques

Question 24

Fact-finding techniques (4)

Answer 24

1. Interview
2. Questionnaire
3. Record inspection (on site review)
4. Observation

Question 25

Analyst use “_____________” to collect information from individuals or groups. The respondent are generally current users of the existing system or potential users of the proposed system.

Answer 25

Interview

Question 26

The use of “_______________” allows analyst to collect information various aspect of a system from a large number of persons.

Answer 26

Questionnaire

Question 27

In “_____________”, analyst examine information that has been recorded about the system and user.

Answer 27

Record Review

Question 28

Allows analyst to gain information they cannot obtain by other fact-finding methods. Through “____________”, analyst can examine first hand information about how activities are carried out.

Answer 28

Observation

Question 29

This method is most useful when analysts need to actually observe how documents are handled.

Answer 29

Observation

Question 30

Is a set of techniques and graphical tools that allows the analyst to develop a new kind of system specification that are easily understandable to the user.

Answer 30

Structure analysis

Question 31

Considers new goals and structured tools for analysis

Answer 31

Structure analysis

Question 32

Structured Analysis Attributes.

Answer 32

1. It is graphic
2. It is logical rather than physical

Question 33

also known as “bubble chart,” has the purpose of clarifying system requirements and identifying major transformation that will come from programs in system design.

Answer 33

Data Flow Diagram

Question 34

It is the starting point of the design phase.

Answer 34

Data Flow Diagram

Question 35

Common symbols of DFD:

Answer 35

1. External Entities
2. Processes
3. Data Flows
4. Data Stores

Question 36

Type of DFD:

are represented by squares as the sources or destination of data.

Answer 36

External Entities

Question 37

Type of DFD:

Are represented by rectangles with rounded corners.

Answer 37

Processes

Question 38

Type of DFD:

are referred by arrows to denote the physical or electronic flow of data.

Answer 38

Data Flows

Question 39

Type of DFD:

are physical or electronic-like XML files denoted by open-ended rectangles

Answer 39

Data Stores

Question 40

It is a structure repository of metadata that provides a comprehensive description of data used.

Answer 40

Data Dictionary

Question 41

Its main purpose is to provide a common language and understanding of the data.

Answer 41

Data Dictionary

Question 42

Components of a data dictionary:

Answer 42

1. Data Element Name
2. Data Type
3. Domain Value
4. Definition/Description
5. Source
6. Date Created

Question 43

It is a technique used by analyst to model and document the logic of information processes.

Answer 43

Structure English

Question 44

Is hierarchical model used in data analysis and decision-making. It visually represents a decision making process by mapping out possible outcomes based on different choices.

Answer 44

Decision Tree

Question 45

It is diagram that presents conditions and actions sequentially and thus shows conditions to consider first, which second and so on. It is also a method of showing the relationship between conditions

Answer 45

Decision Tree

Question 46

Are concise visual representations used to specify which action is performed based on given conditions.

Answer 46

Decision tables

Question 47

They serve as algorithm that produce a set of actions. You can think of them as a structured way to model decision making.

Answer 47

Decision table