The best criteria to check the efficiency of the mills are the extraction and the undiluted juice in bagasse percent fibre (UJBF). A sugar factory which is one of the latest origin in Pakistan has achieved extraction as high as 95.7% and UJBF as low as 35.2%. Mill settings, material of the roller shells, design of the roller grooves, design and orientation of the trash plates, design and materials of other equipments such as mill housing, scrapers, side caps, bearing, hydraulics and the human factor have a substantial effect on the efficiency of cane milling.