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The DTREE Procedure |
If MODIFY stage-name TYPE is given where stage-name is a
stage name specified in the STAGEIN= data set,
then the type of the stage
named stage-name is changed to `DECISION
' if its current type
is `CHANCE
' and is changed to `CHANCE
' if its current type
is `DECISION
'. You cannot
change the type of an `END
' stage. The change of the type of
a stage from `CHANCE
' to `DECISION
' can help
the decision-maker learn how much improvement
can be expected if he or she could pick which of the future (or unknown)
outcomes would occur.
However, if you want to change the type of
a stage from `DECISION
' to `CHANCE
', the procedure
is not able to
determine the probabilities for its outcomes unless you specify them
in the PROBIN= data set.
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