Download Gis Project Management Msc Thesis - Unigis

Master Thesis: GIS Project management Final Version
This approach is highly dependent on the ability to create very good and detailed
requirement definitions and specification.
Figure 12: Waterfall Model
Time
fix error
RB-IIP
Waterfall - A phased approach
Req. Definition
Design
fix error
fix error
Build
© 1997 Hans Bestebreurtje, MSc UNIGIS
fix error
Implement
User
User
Acceptance Acceptance
Maintenance
To use succesfully a methodology based on the “waterfall” approach the following
assumptions must be valid:
{ Pre specification is possible;
{ Change is expensive;
{ Good communications;
{ Static model is adequate;
{ User’s understanding is complete;
{ User’s know (ahead of time) what they want.
It is typical for these kinds of methodologies that the moment of user acceptance is late in
the development cycle. It is not possible to change the solution at this stage without a lot of
effort and expense. The easiest opportunity to change is in the requirements definition
32