Standard of the International Organization for Standardization (ISO) that defines the quality of the product in the production, installation and service stages.
Today the standard includes also ISO 9002 ( ) and ISO 9003

The standard title (quoted from its latest version of 2015):
ISO 9001:2015 specifies requirements for a quality management system when an organization:

a) needs to demonstrate its ability to consistently provide products and services that meet customer and applicable statutory and regulatory requirements, and

b) aims to enhance customer satisfaction through the effective application of the system, including processes for improvement of the system and the assurance of conformity to customer and applicable statutory and regulatory requirements.

All the requirements of ISO 9001:2015 are generic and are intended to be applicable to any organization, regardless of its type or size, or the products and services it provides.

Download the standard from the ISO site (payment) https://www.iso.org/standard/62085.html