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| Category | Subcategory | Representative cases |
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| Dimension | Thickness reduction | Idea stimulus question:
Can the thickness be reduced? |
| Front cover_2.0 t (to 1.5 t) |
| Aluminum tape_0.3 t (to 0.2 t) |
| Inlay panel_0.25 t (to 0.17 t) |
| Modular jack plating_15 uin (to 13 uin) |
| Length/width/height/diameter reduction | Idea stimulus question:
Can the length/width/height/diameter be reduced? |
| Wire harness length_127 mm (to 100 mm standard length) |
| Antistatic brush_wires (to electrification brush only) |
| Power cord length_2.5 m (to 1.8 m) |
| Pipe diameter_150 mm (to 120 mm) |
| PCB test point size_ø1.2 (to ø0.8) |
| Spring-shaft diameter_ø1.0 (to ø0.7) |
| Box height_300 mm (to 360 mm) |
| PCB pattern width_12 mm (to 8 mm) |
| Spring-shaft’s diameter_ø1.0 (to ø0.8) |
| Door harness length_260 mm (to 250 mm) |
| Area/volume reduction | Idea stimulus question:
Can the area/volume be reduced? |
| User manual_183 × 295 mm (to 150 × 210 mm) |
| Power supply switch_50 × 35 mm (to 18 × 20 mm) |
| Main PCB_215 × 160 mm (to 180 × 120 mm) |
| Power supply heat sink and frame ground circuit_55 × 150 mm (to 52 × 112 mm) |
| Weight reduction | Idea stimulus question:
Can the weight be reduced? |
| Door rear cover_1.3 kg (to 1.0 kg) |
| Door assembly_350 g (to 245 g) |
| Packing top cushion form_800 g (to 650 g) |
| Gasket door middle part_320 g (to 250 g) |
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