A positive declaration intended to give confidence; a promise
her calm assurance
Confidence in one’s own abilities or character
you need to build up your self-assurance
The maintenance of a desired level of quality in a service or product, especially by means of attention to every stage of the process of delivery or production
(A theory of) management based on the principle that the highest standards of work must be maintained throughout every level of an organization's operations, especially in order to guarantee efficient working practices and high-quality products and services; usually attributive, especially in total quality assurance (abbreviated TQA), total quality control (abbreviated TQC), total quality management (abbreviated TQM).