The VED classification classifies inventory items in a warehouse in categories based on their general importance for the organisation. The categories are: Vital - Essential - Desirable. Vital items are those without which the productive activities such as clinical consultations or surgeries would come to a halt, or at least be drastically affected. Essential items are those whose stock-out cost is very high for the organisation. Desirable items are those whose stock-out or shortage causes only a minor disruption for a short duration and for which the cost incurred is nominal.