6S extends the familiar 5S approach used in lean management: Sort, Set in Order, Shine, Standardize, and Sustain, with Safety added as the sixth element. For ships, 6S is not only a factory or warehouse housekeeping method. It can also support ship surveys, engine-room rounds, deck operations, maintenance, and onboard safety management. From a marine surveyor's perspective, the point is not whether a ship merely looks clean, but whether it can continue to operate safely, reliably, and efficiently.
The condition seen onboard often reflects the vessel's maintenance discipline, emergency readiness, and safety management capability.
For a marine surveyor, each S is not an abstract slogan. It is a management element that can be observed, questioned, verified, and followed up onboard.
Confirm that working areas contain only necessary items, so unnecessary material does not become an accident source.
Tools, spares, and safety equipment should have clear locations and be quickly available when needed.
Onboard, cleaning is not merely housekeeping. It is part of preventive inspection.
Shipboard management should not rely only on individual experience. It needs consistent procedures, checklists, and standards.
6S should not be performed only before a survey. It should be part of normal shipboard management.
A ship is a high-risk workplace. Safety should not be assumed to be covered by 5S. It should be checked and managed explicitly.
The engine room is one of the clearest areas for assessing 6S maturity because it combines high temperature, rotating machinery, fuel oil, slip hazards, electrical hazards, and emergency response needs.
| 6S item | What the surveyor checks | Possible risk | On-site judgement point |
|---|---|---|---|
| Sort | Waste parts, oil drums, or miscellaneous items left in the area. | Fire, tripping, pollution. | Unnecessary items are removed and working areas remain passable. |
| Set in Order | Tools, spare parts, and fire-fighting equipment are stored in designated places. | Equipment cannot be found during an emergency. | Markings are clear and crew members know where equipment is located. |
| Shine | Oil residue, leakage, or accumulated water. | Slips, fire, equipment failure. | Cleanliness helps abnormal conditions be detected early. |
| Standardize | Round checklists, maintenance records, and work procedures. | Inconsistent work and recurring deficiencies. | Records match the actual condition observed onboard. |
| Sustain | Whether the area is kept in good condition over time. | Last-minute clean-up before survey and weak daily control. | Similar deficiencies do not repeatedly appear and supervision is effective. |
| Safety | PPE, warning signs, isolation, and emergency measures. | Personal injury or major casualty. | High-risk work is supported by permits, isolation, monitoring, and emergency readiness. |
When assessing safety improvements, a surveyor should consider not only whether action was taken, but also whether the control is genuinely effective. The hierarchy of controls helps judge the maturity of risk control.
For example, remove unnecessary obstructions on deck to prevent crew members from tripping. This is usually the most effective control.
For example, use a lower-hazard cleaning agent instead of a highly volatile chemical to reduce exposure and fire risk.
For example, install guards, non-slip flooring, ventilation, or barriers so that personnel are less likely to contact the hazard directly.
For example, establish enclosed space entry procedures, hot work permits, round checklists, training, and deficiency follow-up.
Examples include safety helmets, goggles, safety shoes, gloves, protective clothing, and respirators. PPE is important, but it is usually the last line of defence.
For ships, 6S is a practical tool that connects onboard safety, quality management, and risk prevention.