Class BowTieAnalyzer

java.lang.Object

neqsim.process.safety.risk.bowtie.BowTieAnalyzer

All Implemented Interfaces:

Serializable

public class BowTieAnalyzer
extends Object
implements Serializable

Bow-Tie Analyzer for process safety risk assessment.

Generates bow-tie diagrams linking process hazards with threats (causes) and consequences, including prevention and mitigation barriers. Integrates with the NeqSim process system to automatically identify potential hazards and link to SIS/IPL barriers.

Bow-Tie Structure

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

Version:

1.0

Author:

NeqSim Development Team

See Also:

• Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	BowTieAnalyzer.ConsequenceTemplate	Consequence template from library.
static class	BowTieAnalyzer.ThreatTemplate	Threat template from library.

Field Summary

Fields

Modifier and Type	Field	Description
private List<SafetyInstrumentedFunction>	availableSIFs	Available SIFs for barriers.
private List<BowTieModel>	bowTieModels	Generated bow-tie models.
private Map<String, List<BowTieAnalyzer.ConsequenceTemplate>>	consequenceLibrary	Standard consequence library.
private String	name	Analyzer name.
private ProcessSystem	processSystem	Process system being analyzed.
private static final long	serialVersionUID
private Map<String, List<BowTieAnalyzer.ThreatTemplate>>	threatLibrary	Standard threat library.

Constructor Summary

Constructors

Constructor	Description
BowTieAnalyzer(String name)	Creates a bow-tie analyzer.
BowTieAnalyzer(String name, ProcessSystem processSystem)	Creates a bow-tie analyzer for a process system.

Method Summary

Modifier and Type	Method	Description
void	addAvailableSIF(SafetyInstrumentedFunction sif)	Adds available SIF for barrier assignment.
private void	autoAssignSIFBarriers()
List<BowTieModel>	autoGenerateFromProcess()	Auto-generates bow-ties from process system topology.
void	calculateRisk()	Calculates risk for all bow-ties.
BowTieModel	createBowTie(String hazardId, String hazardDescription, String hazardType)	Creates a bow-tie model for a specific hazard.
String	generateReport()	Generates summary report.
BowTieModel	getBowTie(String hazardId)	Gets bow-tie model by hazard ID.
List<BowTieModel>	getBowTieModels()	Gets all bow-tie models.
String	getName()
private void	initializeLibraries()
String	toJson()	Converts to JSON string.
Map<String,Object>	toMap()	Converts to map for JSON serialization.
String	toString()

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Details

serialVersionUID

private static final long serialVersionUID

See Also:

• Constant Field Values

name

private String name

Analyzer name.

processSystem

private transient ProcessSystem processSystem

Process system being analyzed.

bowTieModels

private List<BowTieModel> bowTieModels

Generated bow-tie models.

availableSIFs

private List<SafetyInstrumentedFunction> availableSIFs

Available SIFs for barriers.

threatLibrary

private Map<String, List<BowTieAnalyzer.ThreatTemplate>> threatLibrary

Standard threat library.

consequenceLibrary

private Map<String, List<BowTieAnalyzer.ConsequenceTemplate>> consequenceLibrary

Standard consequence library.

Constructor Details

BowTieAnalyzer

public BowTieAnalyzer(String name)

Creates a bow-tie analyzer.

Parameters:

name - analyzer name

BowTieAnalyzer

public BowTieAnalyzer(String name,
 ProcessSystem processSystem)

Creates a bow-tie analyzer for a process system.

Parameters:

name - analyzer name

processSystem - process system

Method Details

initializeLibraries

private void initializeLibraries()

addAvailableSIF

public void addAvailableSIF(SafetyInstrumentedFunction sif)

Adds available SIF for barrier assignment.

Parameters:

sif - Safety Instrumented Function

createBowTie

public BowTieModel createBowTie(String hazardId,
 String hazardDescription,
 String hazardType)

Creates a bow-tie model for a specific hazard.

Parameters:

hazardId - hazard identifier

hazardDescription - hazard description

hazardType - type of hazard (e.g., OVERPRESSURE, LOSS_OF_CONTAINMENT)

Returns:

created bow-tie model

autoGenerateFromProcess

public List<BowTieModel> autoGenerateFromProcess()

Auto-generates bow-ties from process system topology.

Returns:

list of generated bow-tie models

autoAssignSIFBarriers

private void autoAssignSIFBarriers()

calculateRisk

public void calculateRisk()

Calculates risk for all bow-ties.

getBowTie

public BowTieModel getBowTie(String hazardId)

Gets bow-tie model by hazard ID.

Parameters:

hazardId - hazard identifier

Returns:

bow-tie model or null

getBowTieModels

public List<BowTieModel> getBowTieModels()

Gets all bow-tie models.

Returns:

list of bow-tie models

generateReport

public String generateReport()

Generates summary report.

Returns:

summary report

toMap

public Map<String,Object> toMap()

Converts to map for JSON serialization.

Returns:

map representation

toJson

public String toJson()

Converts to JSON string.

Returns:

JSON representation

getName

public String getName()

toString

public String toString()

Overrides:

toString in class Object