Requirements
Management
Recent research in the US indicated the time spent between
- Gathering requirements (Business Requirements & System Requirements)
for a new system and
- Building and testing the system
was becoming more biased towards the requirement gathering.
A range of languages were investigated and the results ranged from
a 50:50 split for Assembler to a 90:10 split for Ada.
In other words, for every week spent coding and testing in Ada, 9 weeks
were spent gathering requirements.
As languages become more sophisticated and
develop drop and drag, point and click type interfaces, there is a real benefit
to the developers but it doesn't have a big impact on the Business Users. Obviously the systems can be delivered sooner
but the time the Business Users spend specifying the system is not significantly
effected.
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The trend to buy package solutions does not take away
the issue of improving speed of delivery.
If software is to be written from scratch or bought, the requirements
still need to be developed.
In one sense, if you have a choice between cutting
the requirements gathering process by a month on every project or, with
the same effort, cutting coding and testing time by a month, the obvious
focus would be on requirements. Requirements
are needed whether you write your own software or buy it.
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Key Points:
-
RAD
(Rapid
Application
Development)
-
Prototyping
-
Requirement
Gathering
-
1.
Difficulties
in
Visualization
-
2.
Difficulties
in
gaining
access
to
people
-
3.
Difficulties
in
Compromise
-
4.
Difficulties
in
reaching
Decisions
-
Standish
Research
-
Success
Factors
(weighted)
-
Past
Attempts
to
Improve
Requirement
Gathering
-
The
Three
Generations
of
gathering
System
Requirements
-
Generation
1.
Direct
Contact
-
Generation
2.
Business
Analyst
-
JAD
-
Joint
Application
Development
-
The
Way
Forward
-
Business
Involvement
-
Generation
3
-
Team
Based
-
Process
for
Decision
Making
-
Evolutionary
approach
for
Requirements
-
Other
Aids
-
Break
it
Down
-
Templates
-
Quality
Assurance
-
Planning
-
Repeatability.
-
Evaluating
an
Organisation
-
Summary
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