public function init()
    {
        $this->timetable = [];

        $dimensions['service'] = $this->inflateServices();
        $dimensions['date'] = $this->inflateDates();
        $dimensions['time'] = $this->inflateTimes();

        foreach ($dimensions['service'] as $service) {
            foreach ($dimensions['date'] as $date) {
                foreach ($dimensions['time'] as $time) {
                    $this->capacity($date, $time, $service, 0);
                }
            }
        }

        return $this;
    }