Arun Kumar ji,
Manager under Factory Act is Considerd responcible for the implementing Health safety & welfare provisions , discussed under Act. since Health & safety are 24 hours issue , it is expected that, person who is employed in that particular plant can give propper attention to it,
more over in case of accident / on site emmergency activities role of manager is very important , & person sitting, say 100 km away from the plant cant control the sitution , or cant give propper advise in case of emm. hense it is allways advisable , that Manager should be separate for separate plants.
D V Gosavi