Efficiency

Efficiency enables you to maintain an account of a batch on a certain resource group runs at a certain percentage of its theoretical outflow rate. Efficiency enables you to maintain a record of the output related to a batch that runs on a certain resource group at a certain percentage of the theoretical outflow rate. A batch can run slower in cold temperatures wherein the efficiency cannot be 100 percent. In addition, you may opt to run a batch at a slower capacity instead of completing the batch and shut down a machine and restart again.

The batches when created are assigned the efficiency of the linked resource group. The formula to determine the outflow rate of a batch:

• outflow rate = efficiency x theoretical outflow rate

If an efficiency of a batch is 0.8 and a theoretical outflow rate is 1000 pieces per hour, the outflow rate of the batch is 800 pieces per hour. The efficiency is only applicable for batches with a flow process, flow source or flow buffer method for which the outflow is specified as a rate rather than a fixed duration. If you are still running the same size batch, reducing the outflow extends the batch duration.

Efficiency is not an attribute of the batch; however, this is a computed value from the rate. If you manually overwrite the rate or efficiency of a batch, this efficiency is not retained when the batch is reallocated, instead the resource group efficiency is used. With resource dependent rates, it is not possible to determine whether the rate is an override or not. When a batch is allocated on its current resource, the (possibly overridden) rate of the batch is used. If the batch is allocated on another resource, the resource group efficiency is used. You can lock the resource to prevent a change in efficiency.