scram::core::UncertaintyAnalysis

Uncertainty analysis and statistics for top event or gate probabilities with probability distributions of basic events.

#include <uncertainty_analysis.h>

Inherits from scram::core::Analysis, boost::noncopyable

Inherited by scram::core::UncertaintyAnalyzer< Calculator >

Public Functions

	Name
	UncertaintyAnalysis(const ProbabilityAnalysis * prob_analysis)<br>Uncertainty analysis on the fault tree processed by probability analysis.
virtual	~UncertaintyAnalysis() =default
void	Analyze()<br>Performs quantitative analysis on the total probability.
double	mean() const
double	sigma() const
double	error_factor() const
const std::pair< double, double > &	confidence_interval() const
const std::vector< std::pair< double, double > > &	distribution() const
const std::vector< double > &	quantiles() const

Protected Functions

	Name
std::vector< std::pair< int, mef::Expression & > >	GatherDeviateExpressions(const Pdag * graph)<br>Gathers deviate expressions of variables.
void	SampleExpressions(const std::vector< std::pair< int, mef::Expression & > > & deviate_expressions, Pdag::IndexMap< double > * p_vars)<br>Samples uncertain probabilities.

Additional inherited members

Public Functions inherited from scram::core::Analysis

	Name
	Analysis(Settings settings)
virtual	~Analysis() =0<br>Abstract class.
const Settings &	settings() const
const std::string &	warnings() const
double	analysis_time() const
void	AddAnalysisTime(double time)<br>Adds time to the total analysis time.
void	AddWarning(std::string msg)<br>Appends a warning message to the analysis warnings.
Settings &	settings()

Public Functions Documentation

function UncertaintyAnalysis

explicit UncertaintyAnalysis(
    const ProbabilityAnalysis * prob_analysis
)

Uncertainty analysis on the fault tree processed by probability analysis.

Parameters:

• prob_analysis Completed probability analysis.

function ~UncertaintyAnalysis

virtual ~UncertaintyAnalysis() =default

function Analyze

void Analyze()

Performs quantitative analysis on the total probability.

Note: Undefined behavior if analysis called two or more times.

function mean

inline double mean() const

Return: Mean of the final distribution.

function sigma

inline double sigma() const

Return: Standard deviation of the final distribution.

function error_factor

inline double error_factor() const

Return: Error factor for 95% confidence level.

function confidence_interval

inline const std::pair< double, double > & confidence_interval() const

Return: 95% confidence interval of the mean.

function distribution

inline const std::vector< std::pair< double, double > > & distribution() const

Return: The distribution histogram.

function quantiles

inline const std::vector< double > & quantiles() const

Return: Quantiles of the distribution.

Protected Functions Documentation

function GatherDeviateExpressions

std::vector< std::pair< int, mef::Expression & > > GatherDeviateExpressions(
    const Pdag * graph
)

Gathers deviate expressions of variables.

Parameters:

• graph PDAG with the variables.

Return: The gathered deviate expressions with variable indices.

function SampleExpressions

void SampleExpressions(
    const std::vector< std::pair< int, mef::Expression & > > & deviate_expressions,
    Pdag::IndexMap< double > * p_vars
)

Samples uncertain probabilities.

Parameters:

• deviate_expressions A collection of deviate expressions.
• p_vars Indices to probabilities mapping with values.

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Updated on 2025-11-11 at 16:51:08 +0000