Episode 54 - Management of Change for Process Safety Management

Episode 54 explains the Management of Change (MOC) element of OSHA’s Process Safety Management Standard (29 CFR 1910.119). Dr. Ayers focuses on why MOC is one of the most critical—and most commonly broken—PSM elements. The episode emphasizes that most major chemical incidents happen during or shortly after change, not during steady‑state operations.

The core message: If you don’t control change, change will control your risk.

  🧭 What MOC Is Designed to Do

The MOC process ensures that any change that could affect process safety is:

• Identified

• Reviewed

• Evaluated for hazards

• Approved before implementation

• Communicated to affected personnel

MOC prevents “surprise hazards” from creeping into the system.

  🔍 What Counts as a Change Under PSM

Dr. Ayers stresses that MOC applies to more than just equipment changes. It includes:

• Process chemicals

• Technology

• Equipment

• Procedures

• Operating conditions

• Organizational changes (staffing, roles, shifts)

• Temporary changes

• Emergency changes

The episode highlights that temporary changes are the most dangerous, because they often bypass formal review.

  ⚠️ Common Examples of Changes That Require MOC

• Substituting a chemical or catalyst

• Changing pump size or materials of construction

• Updating control logic or alarms

• Modifying procedures or setpoints

• Bypassing interlocks

• Changing staffing levels or shift patterns

• Installing temporary piping or equipment

If it can affect the process, it requires MOC.

  📝 What an MOC Must Include

A compliant MOC process must document:

• Technical basis for the change

• Impact on safety and health

• Modifications to PSI (Process Safety Information)

• Necessary changes to procedures

• Timeframe for the change (temporary or permanent)

• Authorization requirements

• Training for affected employees

The episode emphasizes that MOC is not paperwork—it’s risk management.

  🧪 Why MOC Fails in Real Facilities

Dr. Ayers highlights common breakdowns:

• Workers don’t recognize something as a “change”

• Pressure to “get the job done” bypasses the process

• Temporary changes become permanent without review

• Poor communication between operations, maintenance, and engineering

• MOC used only for major projects, not day‑to‑day adjustments

• Lack of training on what triggers MOC

These failures often lead to catastrophic incidents.

  🔄 The Link Between MOC and Other PSM Elements

MOC directly connects to:

• Process Safety Information (PSI) — must be updated

• Operating Procedures — must reflect the change

• Training — workers must understand new hazards

• PHA (Process Hazard Analysis) — may need revalidation

• Mechanical Integrity — new equipment or conditions may require new inspections

A change in one element ripples through the entire system.

  🧑‍🏫 Leadership Responsibilities

Safety leaders must:

• Build a culture where workers recognize and report changes

• Ensure MOC is used for all applicable changes, not just big ones

• Provide training on what triggers MOC

• Ensure reviews are thorough and timely

• Verify PSI, procedures, and training are updated

• Hold teams accountable for following the process

• Treat temporary changes with the same rigor as permanent ones

The episode’s core message: MOC is the gatekeeper that prevents uncontrolled risk from entering your process.