| | No. | Author | Complexity index |
| | 1 | Huang [31], Wang [35], Lin [36] | Product precision, surface-to-volume ratio, number of parts, assembly (production) status, assembly operation difficulty, inspection difficulty | | 2 | Ji et al. [12], Lin [36], Fera et al. [37] | Product category and quantity, failure rate | | 3 | Zheng [38], Fu et al. [39], Huang et al. [40] | Material consumption, difficulty in mold manufacturing | | 4 | Zhang [15], Tian et al. [41], Meng [42], Liu and Huang [18] | Factory delivery delay/lead time, inventory, process waiting time, secondary repair rate | | 5 | Wei [43], Yang [44], Yu [45] | Product precision, product life-span, cost, degree of automation | | 6 | Khalili and Chua [17], Mourtzis et al. [46] | Mold manufacturing accuracy, mold turnover rate, mold arrangement time | | 7 | Long [47], Gong [48], Zhang [49] | Number of skilled workers in production line, operating proficiency of workers | | 8 | Wang [50], Zhou [21], Luo [51] | Mold turnover rate, degree of automation, information management level | | 9 | Park and Okudan Kremer [8], ElMaraghy et al. [52], Wang et al. [53] | Product precision, characteristic surface area, abnormal production status | | 10 | Zhao [33], Yan [54], Wang [55], Xie [56] | Number of parts included, number of workers, the difficulty in manufacturing and operating |
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