| Reasons | F1 | F2 | F3 | F4 | F5 | M1 | M2 | M3 | M4 | M5 |
| 1) The package opening position setting is not obvious |
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| 2) Need some strength to open | l |
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| 3) Large package size | l | l | l | l | l | l | l | l | l |
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| 4) Slippery package surface material |
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| 5) Tight package seal | l |
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| 6) The package shape makes it difficult to grasp |
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| 7) Small opening area | l |
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| 8) Soft package material |
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| 9) Hard or fragile material for package opening prompt position |
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| 10) Thin opening area |
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| 11) Fussy opening steps |
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