BirnbaumImportance
BirnbaumImportance[rdist, t] gives the Birnbaum importances for all components in the ReliabilityDistribution rdist at time t.
BirnbaumImportance[fdist, t] gives the Birnbaum importances for all components in the FailureDistribution fdist at time t.
Examples
Calculate component importance:
rdist = ReliabilityDistribution[a && b, {{a, 0.9}, {b, 0.8}}];
BirnbaumImportance[rdist, 1]Please visit the official Wolfram Language Reference for more details.