Fig. 1
Conventional design
Fig. 2
3D Flying-V design
Fig. 3
3D Fishbone design
Fig. 4
Standard geometry of V-shaped non-conventional UW designs
Source: (Öztürkoğlu, 2016)
Tab. 1
Description of the variables
| Parameters | Description |
| ew, el, eh | Dimensions of the openings |
| a1 | Horizontal stacking space |
| a2 | Vertical stacking space |
| a3 | GMP space requirement from the pallet to the wall |
| ap | Aisle width |
| Features | Description |
| m | The slope of the diagonal aisle |
| θ | The angle of the diagonal aisle |
| β | The length of the height of the triangle |
| α | The length of the base of the triangle |
| A | The width of the warehouse |
| B | The length of the warehouse |
Fig. 5
Heuristic comparative assessment of UW designs (HCAUD) framework
Fig. 6
Initial design based on the PLP
Fig. 7
Conventional design of the PBPW
Fig. 8
Flying-V design of the PBPW
Fig. 9
Fishbone design of the PBPW
Tab. 2
Calculated parameters and features
| Parameters | Unit | Initial PLP Design | Alternative PLP Design | Flying-V Design | Fishbone Design |
|---|---|---|---|---|---|
| ew | metres | 1.00 | 1.00 | 1.00 | 1.00 |
| el | metres | 1.20 | 1.20 | 1.20 | 1.20 |
| eh | metres | 1.00 | 1.00 | 1.00 | 1.00 |
| u | metres | - | - | 4.30 | 2.00 |
| a1 | metres | 0.10 | 0.10 | 0.10 | 0.10 |
| a2 | metres | 0.30 | 0.30 | 0.30 | 0.30 |
| a3 | metres | 1.00 | 1.00 | 1.00 | 1.00 |
| ac | metres | - | - | 2.85 | 3.50 |
| ap | metres | 3.60 | 2.70 | 2.70 | 2.70 |
| Features | |||||
| m | metres | - | - | 0.94 | 89.00 |
| θ | degrees | - | - | 43.00 | 42.00 |
| β | metres | - | - | 15.00 | 15.00 |
| ∝ | metres | - | - | 17.55 | 15.15 |
| A | metres | 37.30 | 37.30 | 35.10 | 30.30 |
| B | metres | 15.00 | 15.00 | 15.00 | 15.00 |
| Area | square metres | 559.50 | 559.50 | 526.50 | 454.50 |
| Capacity | pallets | 80.00 | 80.00 | 86.00 | 84.00 |
Fig. 10
Comparison of picking run-time
Fig. 11
Comparison of travel distance
Fig. 12
Improvement in picking run-time
Fig. 13
Improvement in the travel distance
Fig. 14
Final proposed design integrating the Fishbone design in the PLP