Why : The operator pick part slide rail wrong side durring process torque assembly between slide rail with BRK'T handle. (Right process : Operator should be pick slide rail RH to assembly, But operator picked wrong part < Slide rail LH> )
Why : Area keep part slide rail LH & RH before assembly are nearly.
Why : Floor plant lay-out don't separate area for slide rail LH & RH.
Why : Design floor plant lay-out don't consider about assembly wrong side problem.