Unit Procedure
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A strategy for carrying out a contiguous process within a unit.  It consists of contiguous operations and the algorithm necessary for the initiation, organization, and control of those operations.

A unit procedure consists of an ordered set of operations that cause a contiguous production sequence to take place within a unit.  Only one operation is presumed to be active in a unit at any time.  An operation is carried to completion in a single unit.  However, multiple unit procedures of one procedure may run concurrently, each in different units.  Examples of unit procedures include the following:

* Polymerize VCM.

* Recover residual VCM.

* Dry PVC.

Specification notes

You can use Procedure Function Chart diagrams for Unit Procedures