Examples of errors include forgetting to include a data flow or pointing an arrow in the wrong direction. A key reason why keeping data flow diagrams up-to-date is to address issues of system growth.

The ISA5 Committee now is working on a new technical report on instrumentation and control content of process flow diagrams (PFDs) and piping and instrument diagrams (P&IDs). While ISA-5.1 deals ...

In addition, the group updated the document to add new symbols and recognize new automation technology, add new reference sections and add the loop instrument diagrams symbol table. “The ISA5 ...