The rope in a DBR system is the device that regulates the speed at which the bottleneck determines the throughput of the entire plant.
Drum-Buffer-Rope (DBR) is a production planning technique that makes use of the theory of constraints. DBR implementation will increase the efficiency of operations that are constrained internally or by a resource's capacity.
Simply said, DBR establishes a release mechanism (Rope) to guarantee that work is released into the system at the appropriate time, buffers the constraint so that it is never starved, and provides a work schedule for the constraint (Drum).
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