Class SILVerificationResult

java.lang.Object

neqsim.process.safety.risk.sis.SILVerificationResult

All Implemented Interfaces:

Serializable

public class SILVerificationResult
extends Object
implements Serializable

SIL Verification Result.

Contains the results of Safety Integrity Level (SIL) verification for a Safety Instrumented Function (SIF) per IEC 61508/61511. Includes PFD calculation, architecture analysis, diagnostic coverage, and systematic capability assessment.

Version:

1.0

Author:

NeqSim Development Team

See Also:

• Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	SILVerificationResult.ComponentContribution	Component contribution to overall PFD.
static class	SILVerificationResult.VerificationIssue	Verification issue found during analysis.

Field Summary

Fields

Modifier and Type	Field	Description
private int	achievedSIL	Achieved SIL based on PFD.
private int	claimedSIL	Claimed SIL.
private List<SILVerificationResult.ComponentContribution>	componentContributions	Component contributions.
private double	diagnosticCoverage	Diagnostic coverage.
private int	hardwareFaultTolerance	Hardware fault tolerance.
private List<SILVerificationResult.VerificationIssue>	issues	Verification issues found.
private double	pfdAverage	Calculated PFD average.
private double	pfdUpper	PFD upper bound.
private static final long	serialVersionUID
private SafetyInstrumentedFunction	sif	SIF being verified.
private boolean	silAchieved	Whether SIL target is achieved.
private int	systematicCapability	Systematic capability claim.

Constructor Summary

Constructors

Constructor	Description
SILVerificationResult(SafetyInstrumentedFunction sif)	Creates SIL verification result.

Method Summary

Modifier and Type	Method	Description
void	addComponentContribution(String name, String type, double failureRate, double pfd, double percent)	Adds component contribution to PFD.
private void	analyzeArchitecture()
private void	checkForIssues()
int	getAchievedSIL()
int	getClaimedSIL()
List<SILVerificationResult.ComponentContribution>	getComponentContributions()
double	getDiagnosticCoverage()
List<SILVerificationResult.VerificationIssue>	getErrors()
int	getHardwareFaultTolerance()
List<SILVerificationResult.VerificationIssue>	getIssues()
double	getPfdAverage()
double	getPfdUpper()
SafetyInstrumentedFunction	getSif()
int	getSystematicCapability()
List<SILVerificationResult.VerificationIssue>	getWarnings()
boolean	hasErrors()
boolean	isSilAchieved()
private void	performVerification()
void	setDiagnosticCoverage(double coverage)
String	toJson()	Converts to JSON string.
Map<String,Object>	toMap()	Converts to map for JSON serialization.
String	toReport()	Generates report string.
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

sif

private SafetyInstrumentedFunction sif

SIF being verified.

claimedSIL

private int claimedSIL

Claimed SIL.

achievedSIL

private int achievedSIL

Achieved SIL based on PFD.

silAchieved

private boolean silAchieved

Whether SIL target is achieved.

pfdAverage

private double pfdAverage

Calculated PFD average.

pfdUpper

private double pfdUpper

PFD upper bound.

diagnosticCoverage

private double diagnosticCoverage

Diagnostic coverage.

hardwareFaultTolerance

private int hardwareFaultTolerance

Hardware fault tolerance.

systematicCapability

private int systematicCapability

Systematic capability claim.

issues

private List<SILVerificationResult.VerificationIssue> issues

Verification issues found.

componentContributions

private List<SILVerificationResult.ComponentContribution> componentContributions

Component contributions.

Constructor Details

SILVerificationResult

public SILVerificationResult(SafetyInstrumentedFunction sif)

Creates SIL verification result.

Parameters:

sif - Safety Instrumented Function being verified

Method Details

performVerification

private void performVerification()

analyzeArchitecture

private void analyzeArchitecture()

checkForIssues

private void checkForIssues()

addComponentContribution

public void addComponentContribution(String name,
 String type,
 double failureRate,
 double pfd,
 double percent)

Adds component contribution to PFD.

Parameters:

name - component name

type - component type (sensor, logic, final element)

failureRate - dangerous failure rate (per hour)

pfd - PFD contribution

percent - percentage of total PFD

getSif

public SafetyInstrumentedFunction getSif()

getClaimedSIL

public int getClaimedSIL()

getAchievedSIL

public int getAchievedSIL()

isSilAchieved

public boolean isSilAchieved()

getPfdAverage

public double getPfdAverage()

getPfdUpper

public double getPfdUpper()

getDiagnosticCoverage

public double getDiagnosticCoverage()

setDiagnosticCoverage

public void setDiagnosticCoverage(double coverage)

getHardwareFaultTolerance

public int getHardwareFaultTolerance()

getSystematicCapability

public int getSystematicCapability()

getIssues

public List<SILVerificationResult.VerificationIssue> getIssues()

getErrors

public List<SILVerificationResult.VerificationIssue> getErrors()

getWarnings

public List<SILVerificationResult.VerificationIssue> getWarnings()

getComponentContributions

public List<SILVerificationResult.ComponentContribution> getComponentContributions()

hasErrors

public boolean hasErrors()

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

toReport

public String toReport()

Generates report string.

Returns:

verification report

toString

public String toString()

Overrides:

toString in class Object