WaitList calcShippableCap() method

gistfile1.txt

/*
   * Calculate the ShippableCap that represents current maximum shippable units
   * ShippableCap varies during OrderPeriod
   * Takes into account potential gain/loss of shippable subscribers
   * Returns ShippableCap that is compared to current OrderLimit
   */
  public function calcShippableCap( $orderLimit, $shippableCount ) {
    $dailyLossRate = 0.0065;
    $daysRemaining = $this->daysRemainingOrderPeriod();
    $periodLossRate = $daysRemaining * $dailyLossRate;
    $shippableCapPeriod = $this->calcShippableCapPeriod();

    switch( $shippableCapPeriod ) {
      case 10:
        return floor($orderLimit + ( $shippableCount * $periodLossRate ));
        break;
      case 20:
        return floor($orderLimit + ( $shippableCount * $periodLossRate * 0.5 ));
        break;
      case 30:
        return $orderLimit;
        break;
      case 40:
        return floor( $orderLimit - ($daysRemaining * 25) + 10 );
        break;
    }
  }