Plan selection has already been discussed. After a plan fails another needs to be
selected.
If there are no more to select from, plan selection will
fail.
Available failure
information includes the list of plans already tried and the reasons for their failure.
The selector could incorporate rules such as "If plan A fails don't bother trying plan B",
or "If both plan A and plan B failed plan C should be
tried".
4.5.4.12 Suggestions from a Specialist
On exit, a failing specialist may make suggestions. It is unlikely that there will be
many suggestions that a specialist can make about a single attribute. I ...
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