The company is committed to seeing that efforts to scale up production do not result in a diminution [ˌdɪməˈnuːʃən] of quality.

diminution
noun [ˌdɪməˈnuːʃən]

Diminution is a formal word that refers to the act or process of becoming less.

from Anglo-French, and ultimately from the Latin word deminuere, meaning “to diminish,” which is also an ancestor of the English verb diminish.

English