Defect: Warp frame of canvas painting
Cause: 1)poor assembly; 2)didn’t control wood humidity among 7~12%; 3)careless inline inspection
Solution: 1)control wood humidity & store wood part well; 2)add a flat board at the front of packaging line, go through every piece before next.
Typical: * * * *
Rework difficulty: * * *
Rework collateral risk: * * *
