GxP/GMP, GDocP, ISO 9000 and documentation
GxP stands for "Good Practice" which is quality guidelines and regulations. The "x" stands for the various fields, for example Good Documentation Practice or GDocP, Good Financial Practice or GFP and so on. There are many instances of these regulations. One instance of GxP is Good Manufacturing practice or GMP.
GMP describes required Quality Management System (QMS) for manufacturing, testing, and quality assurance in order to ensure that products are safe, pure, and effective. GMP has ultimate goal to enable companies to minimize or eliminate contamination and errors which protects consumers from purchasing a product which is not effective or even dangerous. GMP regulations are required to be used in regulated industries such as food and beverages, pharmaceutical, medical devices, and cosmetics.