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l-03 framework for the requirement engineering (Requirement artifacts…
l-03 framework for the requirement engineering
Requirement engineering context
System context
3 facets of the system context
subject
usage
it system
Development context
Additional requirements engineering context
Core Activities
Elicitation
Goal of elicitation activity is to:-
identify relevant requirements sources.
elicit exsting requirements from the identified sources.
Develop new and innovative requirements .
Negotiation
Goal of the negotiation activity is to:-
identify
conflicts.
analyse
the cause of each conflict.
resolve
the conflicts by means of appropriate strategies.
Documents
conflict resolution and their rationale.
Documentation
Goal of the Documentation activity is to:-
Document requirement information.
specify requirements.
choose documentation formats fit with stakeholder needs.
consistency between different documentation formats.
Requirement artifacts
Goals
Characteristic of goal
prescriptive nature.
expresses stakeholders'intentions.
refines the system vision
solution free
Definition
:
high level objective about a property of the system to be developed or the development project.
Scenarios
Characteristic of a scenario
example of system usage
sequence of interaction steps
requirement into their context
comprehensibility of goals.
Definition
concrete example of satisfying of failing to satisfy a goal
Solution oriented Requirements
3 types of solution oriented requirements(1)
Data
Functional
Behavioral
3 types of solution- oriented requirements(2)
-Specify requirement at a level of details sufficient for supporting later development activities such as design and test.
conceptual/ logical solution
conflict-tree
agreed by all stakeholders
complete
Two Categorisations
Types of requirement
Functional requirements
Quality requirements
Constraint
Requirement artifacts
goals
scenarios
solution- oriented requirements
Cross-sectional activities
3 Validation Goals
requirements artifacts.
core activities.
context consideration.
3 management goals
Requirement artifacts
throughout the system lifecycle
core activities
:
efficient and effective overall RE process
plan and control
alignment of the process to the current project situation
Context
identifying change in the context relevant for the system.