Starting with its definition, the principles of quality assurance (QA) are described, along with its general characteristics in the field of composite materials. The QA program is not standard and depends on the frame where it has been developed. From the craftsman/artisan organization, essentially based on handworkers, to the formal complex organization, in which a strong staff is mandatory, the QA program changes considerably. International standards, such as International Organization for Standardization (ISO) or AS/EN, and regulations help to develop the right program, indicating the content of documentation to be developed. Suggestions about the general characteristics of quality manual and procedures and consequent “system monitoring” are furnished, in order to also get international certifications. Guidelines to develop an exhaustive quality control (QC) program are furnished, highlighting the main characteristics, along with standards that may be taken as reference. The different phases of the product manufacturing are described, reporting how the QC program should be tailored for each of them. The analysis of basic raw materials for composites is performed, highlighting how the QC program should change, passing from solid to liquid raw materials or as a consequence of their different manufacturer. A similar analysis is performed for preimpregnated materials (prepregs). Finally, a description of the statistical process control methodology is reported, highlighting its advantages but also its limitations.