受控發運服務是指供應商沒有有效的措施去防止不良產品流到客戶端或者終端客戶，強制要求供應商承擔質量控制流程，受控發運分成三種等級。
Control shipping service is when the supplier has no necessary measures to prevent NG products flowing to the client or the end user, enforce the supplier to undertake quality control procedures. Control shipping is divided into CSL1 and CSL2 and CSL3 three levels.

第一等級：供應商自己人員或者三方執行出貨前全部檢查。
CSLⅠ：Suppliers’ own staff or 3rd party executes 100% inspection on products before shipping to customer side.

第二等級：在第一等級基礎上，供應商提供客戶認可的三方執行供應商內部或者外部的檢驗。
CSLⅡ：On the basis of CSL1, a third party who is selected by the supplier and approved from the customer side carries out CSL2. Executing within or outside of the supplier’s factory.

第三等級：在第二等級基礎上，三方協助供應商發現問題原因并提出改善建議。
CSLⅢ：On the basis of CSL2, the third party helps suppliers find out the root cause of issues and come up with improvement suggestions.