Package org.jreliability.importancemeasures

Class CriticalityCalculator<T>

java.lang.Object

org.jreliability.importancemeasures.CriticalityCalculator<T>

Type Parameters:

T - The type of the variables of the BDD of the system

public class CriticalityCalculator<T>
extends Object

The CriticalityCalculator is a utility class used to calculate the CriticalityValues and CriticalityBDDs of the components of a system. Uses [ABGT17] in order to calculate the CriticalityBDDs and the corresponding CriticalityValues via boolean expression. [ABGT17] ( https://doi.org/10.1016/j.ress.2016.12.013 )

Field Summary

Fields

Modifier and Type	Field	Description
protected final BDD<T>	bdd
protected final BDDTTRF<T>	bddTTRF
protected final BDDProvider<T>	provider
protected final org.apache.commons.collections15.Transformer<T,ReliabilityFunction>	transformer

Constructor Summary

Constructors

Constructor	Description
CriticalityCalculator(BDD<T> bdd, org.apache.commons.collections15.Transformer<T,ReliabilityFunction> transformer)	Returns a CriticalityCalculator for a specific system with its BDD and ReliabilityFunction Transformer.

Method Summary

Modifier and Type	Method	Description
CriticalityBDDs<T>	getCriticalityBDDs(T var)	Calculates the failure and repair CriticalityBDDs of the given variable (component).
Map<T,CriticalityValues>	getCriticalityValues(double time)	Calculates the CriticalityValues for all components at the specified time.

Methods inherited from class java.lang.Object

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

Field Details

bdd

protected final BDD<T> bdd

transformer

protected final org.apache.commons.collections15.Transformer<T,ReliabilityFunction> transformer

provider

protected final BDDProvider<T> provider

bddTTRF

protected final BDDTTRF<T> bddTTRF

Constructor Details

CriticalityCalculator

public CriticalityCalculator(BDD<T> bdd,
 org.apache.commons.collections15.Transformer<T,ReliabilityFunction> transformer)

Returns a CriticalityCalculator for a specific system with its BDD and ReliabilityFunction Transformer.

Parameters:

bdd - The BDD representing the system structure function

transformer - The Transformer used to get the ReliabilityFunction of variables present in the BDD

Method Details

getCriticalityValues

public Map<T,CriticalityValues> getCriticalityValues(double time)

Calculates the CriticalityValues for all components at the specified time. Uses equations 5 and 6 of [ABGT17] to calculate the CriticalityValues via the CriticalityBDDs instead of the partial derivatives.

Parameters:

time - Time t at which the CriticalityValues of all components is calculated. Must be greater than 0, otherwise an IllegalArgumentException is thrown.

Returns:

results Map of components and their respective CriticalityValues values at time t.

getCriticalityBDDs

public CriticalityBDDs<T> getCriticalityBDDs(T var)

Calculates the failure and repair CriticalityBDDs of the given variable (component). Uses Proposition 1 of [ABGT17].

Parameters:

var - Variable for wich the failure and repair CriticalityBDDs are calculated.

Returns:

CriticalityBDDs Wrapper for the failure criticality BDD and the repair criticality BDD.