In recent years, the concept of contract manufacturing has grown significantly for pharmaceutical companies. Manufacturing various drugs in-house is a large and complex process that requires detailed knowledge, state-of-the-art technology, machinery, rented or owned premises, trained manpower, money, licenses, legal permits and approvals, etc. Branding, labeling, packaging, shipping and transportation are other strenuous tasks. Producing and managing all these activities efficiently and effectively requires experience and skills which most pharmaceutical companies do not have. To avoid all these difficulties, pharmaceutical companies prefer to have their drugs and medicines manufactured by third parties on a contract basis.