Requirements Levels and Types

Question 1

List main levels of requirements.

Answer 1

1. Business Requirements
2. User Requirements
3. Product Requirements

Question 2

List main types of requirements.

Answer 2

~ Business rules
~ Quality attributes
~ Functional requirements
~ Non-functional requirements
~ Limitations, constraints
~ External interfaces requirements
~ Data requirements
~ Software requirements specification, SRS

Question 3

What are the Business requirements?

Answer 3

Business requirements express the purpose for which the product is developed (why is it needed at all, what benefits are expected from it).

Question 4

[…] requirements express the purpose for which the product is developed (why is it needed at all, what benefits are expected from it).

Answer 4

Business requirements.

Question 5

What are the User requirements?

Answer 5

User requirements describe the tasks that a user can perform with the system (system responce to user actions, user scenarios).

Question 6

[…] requirements describe the tasks that a user can perform with the system (system responce to user actions, user scenarios).

Answer 6

User requirements.

Question 7

What is a functional requirement?

Answer 7

It’s a requirement that specifies a function that a component or system must be able to perform.
(A bird should FLY high.
A singer should SING nicely.)

Question 8

What is a non-functional requirement?

Answer 8

It’s a requirement that describes how the component or system will do what it is intended to do.
(A bird should fly HIGH.
A singer should sing NICELY.)

Question 9

[…] requirements describe the behavior of the system, i.e. its actions (calculations, transformations, checks, processing, etc.)

Answer 9

Functional requirements.

Question 10

[…] requirements describe the properties of the system (usability, security, reliability, extensibility, etc.) that it must possess when implementing its behavior.

Answer 10

Non-functional requirements.

Question 11

What is the business rule?

Answer 11

A business rule is a statement that defines or constrains some aspect of the business.

Question 12

A […] is a statement that defines or constrains some aspect of the business. A […] expresses specific constrains on the creation, updating, and removal of persistent data in an information system.

What is it?

Answer 12

Business rule.

Question 13

What is a Quality attribute?

Answer 13

A feature or characteristic that affects an item’s quality.

Question 14

A feature or characteristic that affects an item’s quality.

What is it?

Answer 14

Quality attribute.

Question 15

What Limitation/Constraint does?

Answer 15

Design and implementation constraints legitimately restrict the options available to the developer.

Question 16

What External interface requirements do?

Answer 16

Requirements in this category describe the connections between the system and the rest of the universe. They include interfaces to users, hardware, and other software systems.

Question 17

What Data requirements do?

Answer 17

Data requirements describe the format, data type, allowed values, or default value for a data element; the composition of a complex business data structure; or a report to be generated.

Question 18

What SRS/Software requirements specification does? Where is it used?

Answer 18

SRS describes as fully as necessary the expected behavior of the software system.
The SRS is used in development, testing, quality assurance, project management, and related project functions.

Question 19

What the business rule is intended for?

Answer 19

Business rule is intended to assert business structure or to control or influence the behavior of the business.