Every business organization always wants to provide quality products and services to their customers which are made up through a sequence of operations, which themselves have, specific and defined levels of quality. To achieve the optimum quality level, there must be a visible and dedicated quality control and quality assurance system so that quality standards are maintained in all levels and sections.  To establish such system first need to identify the key areas, which not only affect quality standards, but also impacts on delivery schedules and overall costs. Using proper system those key area bottlenecks need to be solved through analyzing by the sourcing, research and development, production, quality and production support teams. This research paper includes the systematic approach do develop a standard quality management system through which the major quality parameters are set and quality levels are achieved through developing man, machine, materials, control systems etc. A case study was taken of two sewing lines of a reputed garment industry and quality level increased by setting quality control system, improving bottleneck quality points one by one, analysis of costs and benefits by the implementation of this system.