About Revision History

You can use the revision history in a hazards analysis to manage the revisions made for an entire analysis (i.e., HAZOP or What If). When you create an analysis, you link records in multiple families to the Hazards Analysis. When you complete an analysis (i.e., it has been approved), you will change the state of the Hazards Analysis to Complete. When you do so, a snapshot is taken of the Hazards Analysis and each record linked to it.

When the state of a Hazards Analysis is changed to Complete, one record in each of the following families will be created:

Hazards Analysis Revision
Hazards Analysis System/Node Revision
HAZOP Deviation Revision (for HAZOP Analyses)
What If Revision (for What If Analyses)
Hazards Analysis Cause Revision
Hazards Analysis Consequence Revision
Hazards Analysis Safeguard Revision
IPL Checklist Revision

In other words, after the record state for the Hazards Analysis is changed to Complete, one Revision record is created for each record that is linked to the Hazards Analysis (with the exception of the Human Resource, Risk Assessment Recommendation, and Risk Assessment families). Each Revision record stores a snapshot of the source record as it appeared when the state of the Hazards Analysis was changed.

If you re-evaluate the Hazards Analysis, the state of the Hazards Analysis will change to Complete. A second set of Revision records will be created, and so on.