Class Birnbaum<T>

  • Type Parameters:
    T - The type of the variables of the BDD of the system
    All Implemented Interfaces:
    ImportanceMeasure, TimeDependentImportanceMeasure<T>

    public class Birnbaum<T>
    extends java.lang.Object
    implements TimeDependentImportanceMeasure<T>
    The Birnbaum class calculates the Birnbaum Importance for coherent systems. This is done via boolean expression in the CriticalityCalculator using [ABGT17]. As a result, it is equivalent to the importance measure proposed by Zaitseva and Levashenko in [ZL13]. [ABGT17] ( https://doi.org/10.1016/j.ress.2016.12.013 ) [ZL13] ( https://doi.org/10.1134/S000511791302001X )
    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      java.util.Map<T,​java.lang.Double> calculate​(double time)
      Calculates the Birnbaum importances 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
    • Constructor Detail

      • Birnbaum

        public Birnbaum​(BDD<T> bdd,
                        org.apache.commons.collections15.Transformer<T,​ReliabilityFunction> transformer)
        Returns a Birnbaum calculator 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 Detail

      • calculate

        public java.util.Map<T,​java.lang.Double> calculate​(double time)
        Calculates the Birnbaum importances for all components at the specified time. Uses equation 6 of [ABGT17] to calculate the importance from the failure criticality of the component.
        Specified by:
        calculate in interface TimeDependentImportanceMeasure<T>
        Parameters:
        time - Time t at which the Birnbaum importance of all components is calculated. Must be greater than 0, otherwise an IllegalArgumentException is thrown.
        Returns:
        results Map of components and their respective Birnbaum importance at time t.