From investigation can separate this by 2 case as below.
• On 1 July refer to PO 296646 / Gor No 011461, DC face the allocation problem in WMoS and impact to Data Entry cannot perform receive verify. After solve system issued, Data Entry perform receive verify at 01/07/16 17:29
• On 14 July refer to PO 332824 / Gor No 141459, DC have scheduled to evacuation fire drill during 3:30 PM till 4:15 PM which impact to delay return invoice. In the end, this PO receive verify at 14/07/16 16:56.
These two events, staff stated that the documents be returned to supplier same day with product delivery which is time corresponds between receive verify and suppliers leave from DC. Detail as attached file.
• 1 July: Receive verify at 01/07/16 17:29 / Supplier leave from DC 01/07/16 17:52
• 14 July: Receive verify at 14/07/16 16:56 / Supplier leave from DC 01/07/16 17:01
To improve tracking abilities, I assigned Khun Chitnarong to change control process from currently supplier only sign name on log book by add step to record date and time in order to specific tracking more than this.