FieldExpert supports Parts management solution that allows you to manage your inventory via standard Salesforce Product object, with the ability to specify what is the stock each field employee carries in his van and what is the daily demand (i.e. parts linked to Service-Type object and Service object). At the end of the service delivery the emplyee reports how many parts were used via his S1 app, which are then being reflected in the Service Order document generated at the service completion time.