total quality management 

Initialism: TQM
https://doi.org/10.1351/goldbook.08137
Organization-wide efforts to install a permanent climate in which an organization continuously improves its ability to deliver high-quality products and services to customers.
Source:
PAC, 2021, 93, 997. 'Metrological and quality concepts in analytical chemistry (IUPAC Recommendations 2021)' on page 1043 (https://doi.org/10.1515/pac-2019-0819)