Introduction to SIMOPS
Simultaneous Operations (SIMOPS) describes the controlled execution of multiple work activities within the same physical location at the same time, where those activities interact and create compounded risk exposure. These risks often extend beyond what conventional task-based assessments can identify. In industrial sectors such as oil and gas, petrochemical processing, LNG facilities, power generation, marine terminals, and heavy manufacturing plants, overlapping work scopes are common. Construction may proceed alongside live production, maintenance may coincide with commissioning, and operational teams may share space with contractors. In such environments, risk does not arise from individual tasks alone it emerges from their interaction. A structured SIMOPS study provides the framework needed to manage these activity interfaces safely and systematically.
What is a SIMOPS Study?
A SIMOPS study is a structured risk evaluation process focused on identifying and managing hazards created by concurrent operations. It examines how overlapping activities influence one another and defines control measures that prevent escalation, disruption, or harm.
Unlike isolated risk assessments that review activities independently, a SIMOPS assessment evaluates the combined effect of multiple work fronts operating in shared zones. The objective is to ensure operational continuity while maintaining safety and compliance.
Key Objectives of a SIMOPS Study
- Detect hazards introduced by overlapping activities
- Assess risk generated by interaction between work scopes
- Review effectiveness of existing engineering and procedural controls
- Recommend additional mitigation where exposure remains unacceptable
- Align concurrent activities with Permit to Work (PTW) processes
- Define execution boundaries, authorization requirements, and safe sequencing
Why SIMOPS is Critical in Industrial Facilities
Operational overlap is often unavoidable due to project schedules, plant modifications, shutdown constraints, and commercial pressures. Without structured coordination, these conditions may lead to:
- Injury or fatal incidents
- Fire or explosion escalation
- Equipment failure or process interruption
- Environmental impact
- Regulatory breaches
- Financial loss from downtime
Many of these exposures are invisible when each task is assessed independently. A formal SIMOPS risk assessment brings these hidden interaction risks into focus before execution begins.
Core Components of a Simultaneous Operations Risk Assessment
1. Identification of SIMOPS Scenarios
Planned activities within shared operational zones are mapped to identify potential overlaps. This establishes where concurrent work may introduce additional exposure.
2. Interface Hazard Identification
Each overlapping activity is evaluated to determine how it may influence adjacent operations. Conflicts may arise from energy sources, equipment dependency, restricted space, or movement pathways.
3. SIMOPS Classification and Authorization
Activities are categorized according to risk profile:
- Allowed
- Restricted
- Prohibited
This classification defines execution limits and establishes control requirements before work proceeds.
4. Detailed Risk Evaluation
Identified hazards are analyzed using structured risk matrices that consider likelihood and consequence. This evaluation determines whether existing safeguards are adequate or require reinforcement.
5. Control Review and Residual Risk Assessment
Existing isolation methods, engineered barriers, supervision mechanisms, and PTW controls are examined to verify effectiveness. Residual risk is then compared against defined acceptance criteria.
6. Additional Mitigation and Accountability
Where exposure remains elevated, supplementary controls are implemented. These may include:
- Physical segregation measures
- Revised sequencing plans
- Enhanced communication protocols
- Strengthened emergency readiness
Clear responsibility assignments ensure that mitigation measures are implemented and maintained.
SIMOPS Workshop – Structured Coordination Platform
A SIMOPS workshop brings together operations, maintenance, construction, safety, and contractor teams to collaboratively evaluate concurrent activities.
During the workshop:
- Activity interfaces are reviewed
- Interaction hazards are identified
- Risk levels are ranked
- Control measures are agreed upon
- Execution sequencing is finalized
This structured engagement ensures alignment and shared understanding before field activities commence.
Integration with Permit to Work (PTW) Systems
One of the most important outcomes of a SIMOPS study is alignment with the Permit to Work framework. By linking activity classifications and control requirements directly to PTW authorization, organizations ensure that unsafe combinations are prevented at the planning stage rather than corrected reactively. This integration strengthens oversight, accountability, and documentation during execution.
Operational Benefits of a SIMOPS Study
A disciplined SIMOPS approach provides tangible advantages:
- Safer work environments
- Reduced likelihood of activity-related incidents
- Improved compliance with regulatory and corporate standards
- Stronger contractor coordination
- Fewer operational disruptions
- Better schedule predictability
- Lower overall risk exposure
Typical SIMOPS Applications
SIMOPS evaluations are particularly relevant in:
- Brownfield upgrades and plant expansions
- Turnarounds and shutdown campaigns
- Live facility tie-ins
- Commissioning during partial operations
- Multi-contractor environments
- Offshore and marine installations
- LNG and gas processing facilities
These situations require structured planning to ensure safe concurrent execution.
Conclusion
A SIMOPS study is a critical risk management process used to safely manage overlapping activities in complex industrial facilities. By applying structured hazard identification, interface risk evaluation, and Permit to Work (PTW) integration, organizations can control simultaneous operations without compromising safety or operational continuity. iFluids Engineering & Consultancy W.L.L. provides specialized Simultaneous Operations risk assessment services to help industries identify activity conflicts, implement mitigation measures, and ensure safe and efficient operations. Contact Us for expert SIMOPS study support.