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First-level index | Second-level index | Index measurement method | Unit |
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Structural complexity D1 | Surface-to-volume ratio F11 | Ratio of surface area to volume of a component | % |
Number of openings F12 | Number of openings in a component | Piece |
Reinforcement ratio F13 | Ratio of longitudinal rebar’ area to effective area in a component’s cross section | % |
Number of embedded parts F14 | Total number of embedded parts in a component | Piece |
Amount of exposed rebar F15 | Weight of rebar exposed of a component | kg |
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Production complexity D2 | Material consumption F21 | Consumption cost of rebar, concrete, and embedded parts for a component | 1000 RMB/m3 |
Mold assembly time F22 | Average time required to assemble molds of a component | min/m3 |
Mold manufacturing accuracy F23 | Average error of mold precision tests for a component | mm |
Waiting time in production line F24 | Average waiting time in all production processes for a component | min |
Abnormal production status F25 | Average frequency of abnormal status during the production for a component (such as mechanical equipment failures and water and power outages) | Time |
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Management complexity D3 | Operating proficiency of workers F31 | Average working years of first-line workers of a component | Year |
Mold turnover rate F32 | Average time duration for the mold to be used once | Day/time |
Delivery delay F33 | Average delivery delay time of a component | Day |
Repair rate F34 | Number of components needing repair per 100 pieces of the component due to quality issues | % |
Degree of automation of production line F35 | Ratio of mechanized operation procedures to total procedures of a component | % |
Information management level F36 | Timeliness and accuracy of information transmission for a component, which is divided into five levels: low, comparatively low, normal, comparatively high, and high | 2, 4, 6, 8, and 10 |
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