Defect: Bottom warped | storage with paperboard bottom
Cause: bottom paperboard was warped and factory missed this part inspection.
Solution: 1) paperboard storage condition must be flat in dry warehouse; 2)each piece sewing should be appropriate and check to be flat after all assemble complete. 3)store in dry warehouse.
Typical: * * *
Rework difficulty: * * *
Rework collateral risk: * * *
