The blood supply chain management is very important in the healthcare system. Because blood is a perishable product and needs more attention. In order to minimize the amount of blood into which has lost the ability to separate all components and maintain its health, the necessary policies should be considered to collect it before spoiled. To this end, all blood units from the time of donation to the time of processing must be delivered to the processing center to process no later than six hours after receipt. The amount of blood received from donors at the end of the working day is another issue raised in this study. If donors go to the site after harvesting the last blood units and no blood is received from them, it will have a direct impact on their motivation. In this study, we tried to reduce the number of disappointed donors, and increase the amount of collected blood by picking up blood units in the last moments of closing blood donor sites.
