The external buyer's role implies access to various functions. It is possible to restrict this access via authorization levels by status. Each level corresponds to one or more actions:Purchase suggestion - Deletion of purchase suggestionsPlanned purchase - Creation, modification and deletion of planned purchasesFirm purchase - Creation, modification and deletion of firm purchasesInter-site suggestions - Deletion of inter-site suggestionsPlanned inter-site order - Creation, modification and deletion of planned inter-site ordersFirm inter-site order - Creation, modification and deletion of firm inter-site orders