Package neqsim.process.safety.risk.bowtie

package neqsim.process.safety.risk.bowtie
Bow-Tie Diagram Generation Package.

This package provides bow-tie diagram generation and analysis capabilities for process safety risk assessment. Bow-tie diagrams visualize the relationship between threats, hazards, and consequences with their associated barriers.

Key Classes

  • BowTieAnalyzer - Main analyzer with threat/consequence libraries
  • BowTieModel - Individual bow-tie model with threats, consequences, and barriers

Bow-Tie Structure

  THREATS           TOP EVENT           CONSEQUENCES
    │                  │                    │
    ├──▶ Barrier ──▶   ◆   ──▶ Barrier ──▶ ├──
    │                  │                    │
    ├──▶ Barrier ──▶   │   ──▶ Barrier ──▶ ├──
    │                  │                    │
(Prevention)      (Hazard)            (Mitigation)

Example Usage

// Create analyzer
BowTieAnalyzer analyzer = new BowTieAnalyzer("Platform Safety Analysis", processSystem);

// Add available SIFs as barriers
analyzer.addAvailableSIF(hipps);
analyzer.addAvailableSIF(esd);

// Auto-generate bow-ties from process
List<BowTieModel> bowTies = analyzer.autoGenerateFromProcess();

// Or create manually
BowTieModel overpressure =
    analyzer.createBowTie("SEP-001-OVP", "Overpressure in HP Separator", "OVERPRESSURE");

// Add custom threat
BowTieModel.Threat threat = new BowTieModel.Threat("T-001", "Blocked outlet valve", 0.1);
overpressure.addThreat(threat);

// Add barrier
BowTieModel.Barrier hippsBarrier = new BowTieModel.Barrier("B-001", "HIPPS System", 0.001);
hippsBarrier.setBarrierType(BowTieModel.BarrierType.PREVENTION);
overpressure.addBarrier(hippsBarrier);

// Calculate and visualize
analyzer.calculateRisk();
System.out.println(analyzer.generateReport());

Integration with SIS

The bow-tie package integrates with the SIS package to automatically assign Safety Instrumented Functions (SIFs) as barriers with proper PFD values.

Version:
1.0
Author:
NeqSim Development Team
See Also: