A process is a set of steps which describe material flow. Each step on a process can have many resource types, properties, and components - all of which are used to describe how the materials in a process are related.
A process can contain procedural tasks which describe how work must be performed on the materials to achieve a desired outcome.
A process acts as a template for data collection performed in an experiment. Each experiment created on a process is tied to a specific process version - each of which is recorded to document how the process has changed through time.