Computer application services provider featuring temporary use of on-line, non-downloadable software in the field of supply chain management, namely, for management of inbound and/or outbound inventory, and shipment management, tracking and product management from origin to destination, calculation, projection, monitoring and updating of transit times, tracking and management of on-site storage, consumption rates and replenishment projections, order and shipment timing, monitoring inventory, providing management reports, alerts exceptions, and statistics; software maintenance and support