DiscreteCollection
The tracker process unit components are responsible for tracking of material on behalf of the process units. The tracker process units are responsible for material transactions, run transactions, time allocation and data acquisition transaction related to the process units.
The DiscreteCollection tracker process unit is a real time tracker process unit optimized for discrete tracking. With discrete tracking the make process of materials is omitted. This means that the CreateTime and MakeTime of discrete materials are always the same. With DiscreteCollection the order of the materials in the TPU is insignificant. This means that materials can be moved out of the TPU in any order, and materials are referenced by their identificators for movement out of the TPU. The DiscreteCollection component should only be used in cases where the whole chain of process units produce discrete materials, or in continuous processes where considerable parts of the chain involves discrete materials.