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Are there any other approaches to the scheduling problem, other than the
two listed below:
1) Manual method
	A scheduler views the participants' calendars and determines the
most suitable time.

2) Rule-based method
	A scheduler writes rules for an agent to automatically locate the
most suitable time.


Also, what are the advantages/disadvantages of these approaches?

Can anyone refer me to papers written on systems that implement the second
approach?

Thanks.

Muru Palaniappan