I first met and followed professor John Nelson Warfield's work, since the 70's.
He deals with Systems Science,made easy
to solve any complex social problems,
getting expert opinions in groups,
usually too many conflicting opinions,
using NGT- Nominal Group Techniques and then
structuring those opinions or ideas using
ISM - Intrepretive Structured Modelling.
In just 2, 3 days you public executive,or top management,
can get a better understanding of
almost all your complex social problems
and reducing them,
to a simple "PERT like" chart,
with consensus of your pairs...
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