ISO 9001 trains are based on some factors. These include facilities and maintenance of this facilities. To add in further detail; rake maintenance (Hardware- Coach-seats/berths, amenities likes Fans, ACs, Switches etc., sign boards), cleanliness (Overall including Cabins, Curtains, Mirrors, Toilets, Wash Basins, Sign Boards), Facilities (Dining, Charging etc.), Record Keeping etc. etc.
Repost from one of our Members: Akshay
Re# 230219-8