| Category | No. | Issue | Cause | Solution / Countermeasure |
| Metal Façade Installation | 1 | Aluminum panels fixed without subframe | Workers cut corners and worked carelessly, with no quality awareness | Strengthen quality education and briefings to enhance workers' awareness of quality. |
| 2 | Panel surface uneven, joints misaligned, offsets present | Connection fittings not properly fixed, production deviation | Ensure that the connecting components are securely fixed. | |
| Installation of fittings not straight | Position and align fittings using guide lines during installation | When fixing, align according to a reference line. | ||
| Metal panels themselves uneven | Strengthen quality inspection of incoming metal panels | Strengthen the quality inspection of incoming metal panels. | ||
| 3 | No rubber pads at contact points between aluminum panels and steel subframe | Workers cut corners | Strengthen the quality inspection of incoming metal panels. | |
| 4 | Metal panels scratched | Inadequate protection measures | Enhance protection measures after panels arrive on site | |
| 5 | Panels fixed with blind rivets | Poor briefing, insufficient inspection | Aluminum panels should not be fixed with blind rivets; only machine screws should be used | |
| 6 | Color difference among metal panels | Not carefully inspected upon arrival | Strengthen incoming material inspection; ideally, use panels from the same manufacturer for the whole project | |
| Panels from two or more manufacturers used, causing color deviation |
| (incorrect) | (correct) |
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The aluminum panel is in direct contact with the steel frame without a rubber pad
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The aluminum panel is contact with the steel frame with a rubber pad
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Edged aluminum panel installed without a subframe
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Aluminum panel subframe installation meets design requirements
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Finished product protection not in place, aluminum panel scratched
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Finished product protection in place, aluminum panel undamaged
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