Nagios::Plugin::Threshold3pm

    # NB: This is an internal Nagios::Plugin class.
    # See Nagios::Plugin itself for public interfaces.
  
    # Constructor
    $t = Nagios::Plugin::Threshold->set_thresholds(
        warning  => $warning_range_string,
        critical => $critical_range_string,
    );
    # Value checking - returns CRITICAL if in the critical range,
    # WARNING if in the warning range, and OK otherwise
    $status = $t->get_status($value);
    # Accessors - return the associated N::P::Range object
    $warning_range  = $t->warning;
    $critical_range = $t->critical;