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Requirements Capture 8 Hence the decision support system for decision sup-
port must provide a repository (a data base) for Exec Plan as well as appropriate
functions, for example for initializing Exec Plan, for inserting new, and for dis-
playing, searching, sorting, updating, deleting analyses, including execution of
functions and recording results. All insertions and updates usually require the
user to provide textual comments ( Text ).
here as no new principles are being
illustrated and as the rest is, from now on, trivial!
We end our example
Requirements Capture
5.8
The \Grand" State
Summarizing we can say that the state of a DSS for SD consists of:
type
=Synopsis
Resource Info
Atrs Inds
Equity Functs
Exec Xs
Plan
Exec Plan
Requirements Capture 9 Hence the decision support system for sustainable
development must provide a user interface to this state, to its various parts, easy
selection and execution of functions: main and auxiliary, user- as well as systems
dened.
5.9
Decision Making
Throughout this and the previous section we have implied that (i) resources had
to be identied, (ii) representations sought, (iii) attributes (\of interest") and (iv)
indicators (likewise \of interest") had to be determined amongst alternatives,
(v) equity and (vi) analysis functions dened, likewise exposing the analyzer
and planner to many options. Once analysis functions were executed and (vii)
results interpreted choices again arise. Finally when planning, based on analysis,
commences (viii) nal options present themselves (or otherwise).
All these situations must be carefully recorded; chosen paths (ie. decisions)
must also be recorded and it must all be related to the various (i{iix) alternatives.
Requirements Capture 10 Hence the decision support system for sustainable
development must provide easy means for the user: preparer, analyzer and plan-
ner, to record all alternatives, to mitivate choices taken, and to \play{back" paths
of identication, dentions, executions and choices, also along rejected alterna-
tive paths.
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