The inventory of critical spare parts : maintenance of the equipment, pricing, lifetime and distance to the central warehouse.
A position local warehouse to another warehouse interesting to note as well. Effect of space is called spatial dependence in deciding the allocation of spare parts inventories in multi-echelon systems.
Some of the factors that greatly affect the supply of critical spare parts can be prioritized.
The result is information regarding the important factors in deciding the inventory of spare parts in a multi-echelon system.