MOC

Module from the Process Safety Management Curriculum curriculum.

Module 4 - Management of Change (Element 11) · Learning Objectives · 1. Identify MOC triggers: equipment, process, procedure, software, chemistry · 2. Distinguish replacement-in-kind (RIK) from non-RIK changes · 3. Apply required MOC reviews: safety, PHA, training, documentation, PSSR · 4. Close MOC: equipment tagged, documentation updated, training complete · 5. Audit MOC program for drift (common PSM audit finding) · MOC Triggers and Reviews

Change Type	MOC Required?	Reviews	Training	Notes	Example
Equipment RIK	No MOC, still document	Part number check	No	Same spec	Pump replacement same model
Equipment non-RIK	Yes	Full review	Usually yes	Includes upgrade	Motor HP increase
Process material (chemistry)	Yes	Full + PHA revalidation	Usually yes	Major	Feedstock change
Operating procedure revision	Yes if non-RIK	Supervisor review	Yes	Step change	New SOP revision
Instrumentation / DCS software	Yes if logic change	E&I review	Operators	Reconfig	Setpoint change
Piping replacement non-in-kind	Yes	Metallurgy, stress	Usually no	Material upgrade	CS to 316
Temporary (hose, piping)	Yes (temporary MOC)	Limited scope	Usually	Short duration	Hot tap for startup
Metallurgy upgrade	Yes	Material engineer	No	Corrosion mitigation	SS tube bundle
Staffing / manning	Yes per 1910.119 (l)	Operations review	Usually	Reduction in crew	Night shift cut

Source: Process_Safety_Management_Curriculum_v1.xlsx · Sheet: MOC

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