532 Chapter 24 Other Approaches to Planning
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If the subproblems are sufficiently different from each other, it may be best to
solve them using separate domain-specific planning systems, such as a planner
and a scheduler (see Chapter 15), or a manufacturing process planning system
and a production planning system [117].
Plan merging often involves operator merging, i.e., merging some set of operators
within a plan or set of plans into a single operator that achieves the same goals. The
motivation for doing this is that if the operators can be merged, this may reduce the
plan’s cost, time, or resource requirements.
Domain-specific approaches for plan merging have been developed in some
application domains, such as Hayes’s Machinist system [263] for manufacturing ...