In this research paper we present the work content & variability reduction of MCV model in main assembly line. At Present found that line has very less automation & most of the operations are done manually. That causes the work content & variability is more in each station of Main assembly line. Present line has a problem of line balancing and also the problem of tools & fixtures at various stations. The requirement of the vehicles depends on the demand of the customers. Usually, the marketing peoples convey the requirement of the vehicles to the production planning and control department.