In manufacturing, quality is defined as a measure of excellence or a state of being free from defects, deficiencies and significant variations. It is brought about by strict and consistent commitment to certain standards that achieve uniformity of a product in order to satisfy specific customer or user requirements. Quality products help to maintain customer satisfaction and loyalty and reduce the risk and cost of replacing faulty goods.

Your customers expect you to deliver quality products. If you do not, they will quickly look for alternatives. Quality is critical to satisfying your customers and retaining their loyalty so they continue to buy from you in the future. Quality products make an important contribution to long-term revenue and profitability. The quality of a product is very important for a stable manufacturing industry. The defected or the faulted goods must be sorted out from the good ones. So it is extremely important to maintain the quality of any manufacturing product. This is why we have introduced the SPC module. This module ensures the quality of items and increase the productivity of efficient products.

Although Quality and SPC are sometimes used interchangeably, they are different. Quality is very broad and includes much more than just SPC, while SPC can be considered a tool in the Quality process.

A quick example may help to point out the difference. If product in the warehouse is going bad over time, then a process has to start to narrow in on the cause. It will involve brainstorming, perhaps creating fishbone diagrams to determine the possible causes. In the case of an off-color product, it could be rust building up in pipes, chemical formulation changes, or different raw materials being used. This part of the example refers to quality. Unlike SPC, quality requires more than installing software, collecting samples and analyzing the results. 

Once the most likely causes of the off-color product have been determined, SPC can be used to monitor the attributes and narrow down and isolate the cause. It may be determined that when the pH  of a sub-ingredient falls out of a certain range, the stability of the product color is degraded. With this knowledge, SPC can be used to monitor the pH so that if it falls outside of range, it can be corrected quickly. This prevents a bigger problem that may arise when the product stays in the warehouse for a period of time.

When a manufacturing process involves complex machines to complete production, a temporary malfunction or a breakdown in an intricate piece of equipment can affect the manufacturing process. Identifying means of improving efficiency of all working parts of production promotes a continual and more efficient operation. Positioning of equipment and the personnel required to operate machines can also affect production.

Environment
The climatic conditions to which the commodity was exposed before receipt; what conditions are likely to occur whilst commodities are held in storage.

Raw materials
The availability of materials and the development of new, hi-technology materials will have an influence on the final design of a product. Quality of the finished product always depend on the quality of raw materials.

Methods
Quality also depends on the methods used to produce it and the chemicals added during production. To maintain high standards of quality, companies are investing in new machines and following new procedures and methods these days.