Difficulties and Problems

• Several instances of the same resources(e.g. the machines type 1 and 2).

• Moving resource(e.g. the cranes).

• Resources may “block” other resources (e.g the batches and the cranes).

• Time constraints(e.g. upper bound on recipe completion time).

• Resources that cannot idle(the casting machine)

Feasible schedule for given output sequence?

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