Definition from Gartner
βFive-part checklist to help eliminate waste in the workplace: In Japanese β βSeiri, Seiton, Seiso, Seiketsu and Shitsukeβ; loosely translated as βSort, Straighten, Sanitize, Standardize and Sustain.β
Going further
I've curated 400+ definitions just like this one in a tiny dictionary. In this glossary you can easily access, search and understand 400+ terms that service designers and other innovators use.