kai·zen 
(kīzĕn′)
(kīzĕn′)n.
A business management system or philosophy aimed at producing ongoing incremental improvements throughout an organization, especially in quality and efficiency.
[Japanese : kai, change (from Middle Chinese kaj´; also the source of Mandarin gǎi) + zen, good (from Early Middle Chinese dʑian'; also the source of Mandarin shàn).]