Part 3 Flashcards
(12 cards)
- Three types of requirement defined at this staged
- Should also define overall organizational objectives for the system
SYSTEM REQUIREMENTS
System functions are defined in an abstract way
Abstract Functional Requirements
Non-functional requirements for the system in general are defined
System Properties
Unacceptable system behavior is specified
Undesirable Characteristics
Should define why a system is being procured for a particular environment
System Objectives
To provide a fire and intruder alarm system for the building which will provide internal and external warning of fire or unauthorized intrusion
Functional Objectives
To ensure that the normal functioning of work carried out in the building is not seriously disrupted by events such as fire and unauthorized intrusion
Organisational Objectives
Organize requirements into related groups
Partition Requirements
Identify a set of sub-systems which collectively can meet the system requirements
Identify sub-systems
Causes particular problems when COTS are integrated
Assign requirements to sub-systems
Critical activity for parallel sub-system development
Define sub-system interfaces
- Requirements engineering and system design are inextricably linked
- Constraints posed by the system’s environment and other systems limit design choices so the actual design to be used may be a requirement
Requirements and Design
