Supply Chain in the agribusiness industry is strongly influenced by warehouse facilities. Bananas that have been harvested need to be stored properly before being distributed to buyers. This study aims to design business process improvements by using the Internet of Things (IoT) to increase storage time efficiency. The Business Process Re-engineering (BPR) method was used to design improvements to warehouse operational process using the iGrafx software. Improvements to warehouse operations are carried out on the inbound, ripening, and outbound process. This study resulted in two scenarios in the inbound process, scenario 1 using an automated inventory system based on RFID becomes the scenario with the greatest time efficiency of 18%. The ripening process has three scenarios, scenario 3 which combines the use of an automated inventory system based on RFID and an automated monitoring system has the highest efficiency of 24%.