Figure 2
At the top is a box labeled “Maintenance policy for rolling stock”, with three arrows pointing downward to three separate boxes. On the left is an “Item hierarchy” box showing a structure where “Fleet” branches into two “Vehicle” boxes, which further branch into three “H V C” boxes. On the right is a box labeled “Organization providing maintenance”, listing: “replacement facility”, “repair shop”, “planning”, and “area”. In the center is a box labeled “Maintenance resources”, listing: “spare parts”, “people”, “information”, “facilities”, “support equipment”, and “finances”. All three upper boxes connect downward into a central box labeled “Maintenance concept”, with a side label “Indenture levels” on the arrow coming from the item hierarchy and “Maintenance echelons” on the arrow from the organization box. Below “Maintenance concept”, a downward arrow leads to “Preventive maintenance”. From “Maintenance concept”, an arrow branches right to “Corrective Maintenance”, which further splits into “Immediate Maintenance” and “Deferred Maintenance”. From “Preventive maintenance”, two paths are shown: a downward arrow leading to a box labeled “Predetermined (time or mileage based)”, and an arrow leading left to a box labeled “Condition based”. At the bottom, a long dashed rectangle contains six labeled boxes: “cleaning”, “lubrication”, “replacement”, “repair”, “adjustment”, and “refurbishment”. Arrows from “Condition based”, “Predetermined (time or mileage based)”, “Immediate Maintenance”, and “Deferred Maintenance” lead downward to this dashed box.The relationship between maintenance policy and maintenance concept, adapted/inspired from IEC 60300