Functional requirements
Assessing
data requirements
Compiling a list of functions required
Undertaking a Functional Requirement
Study
Once the project has been defined a function evaluation
is necessary. This includes:
This means working out what data
is needed and how it is to be processed.
The project proposal should have already defined the
question/s that the GIS is being used to address so from this it is possible
to determine what data will be needed to answer these questions. This
means that a list can be compiled that consists of:
- data inputs
- data volumes
- data formats
- sources
- frequency of update
Compiling a list of GIS functions required
Once the data requirements have been determined
it is important to decide how the data is going to be processed and what
analyses
are going to be performed on it. This information can be derived from
the aims of the project.
Undertaking a Functional Requirement Study
(FRS)
Data and functional requirements are collated
as part of the functional requirements study (FRS). Once this is complete,
users end up with
- a known set of products to be generated by
the system
- a list of data needed
- a list of the functions that must operate on
the data to generate the outputs.
From this stage the user can then go on to evaluate
a GIS system for their own particular use.
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