| Example observations | Superelevation in curvature Alignment of rails Gauge between 2 internal faces of the rails Cracks in rails Difference of high between 2 rails (twist) Aspect and quantity of ballast Wear in fasteners Aspect of sleepers Misalignment in switches |
| Example actions | Compact the ballast (tamping) Ballast unloading Ballast cleaning Rail grinding Sleeper and fasteners replacement |
| Example reward | The objective is to minimize defects and maintenance costs |
