In fact, it's very simple, that is, I didn't get in and out of the warehouse in time on the computer. The reasons are weak sense of responsibility, laziness and so on. I will promise not to make such a mistake again. The measures taken are: 1, input the documents into the computer before entering and leaving the warehouse; 2. After the materials are delivered out of the warehouse, indicate that they have been entered into the computer on the delivery and receipt documents; 3. Check the accounts and physical inventory with the computer in time after warehousing.