About CIP

You may need to schedule CIP (Cleaning In Place) batches. This scheduling can be based on volume, processing time, transition costs, a number of batches, or absolute time.

These examples show how you can use CIP modeling:

• You can use an absolute-time CIP rule to control bacterial pollution. A resource is contaminated from the start of the first process batch after a CIP batch. When the first process batch is finished, bacterial growth continues even without any further processing. You may need to schedule a CIP batch after 48 hours, no matter how many batches have been processed after the first batch that started the contamination.
• A resource may require cleaning after 10000 kg have been processed since the previous CIP batch. You can define a CIP rule so that a CIP batch is scheduled when the sum of the batches' quantities exceeds 10000 kg.

CIP batches are displayed as non-productive time in the utilization graph.

This topic describes how to add CIP to the model and how to use the solver to make sure that CIP batches are inserted at the places that are required by the CIP rules.

See these topics:

• About CIP modeling
• About CIP rules