In the 5S methodology, which step is dedicated to maintaining improvements over time?

• A. Sort
• B. Shine
• C. Sustain
• D. Set in order

Answer: (C)

Sustain is about turning improvements into lasting habit by embedding the new routines, accountability, and standard practices that prevent the gains from slipping away. It involves training people, establishing standard work, regular audits, and ongoing management support to keep the improvements alive and to drive ongoing refinement.

After the initial steps that remove waste (Sort), organize for flow (Set in order), and keep the area clean (Shine), Sustain ensures these improvements are maintained over time. It makes adherence to the new standards part of daily work, so the gains become a consistent, long-term practice rather than a one-time effort.