function getDIOH($articles_id, $current_stock) { //old method using old function //return calculateDIOH($current_stock, $this->log_articles[$articles_id][self::DIOH_BASENUMBER_COLUMN_NAME]); //new method using forecasting $fc = new forecasting(); return $fc->calculateDIOH($current_stock, $this->log_articles[$articles_id][self::FORECAST_DAILY_COLUMN_NAME]); }