| Number of inputs | Models | Type of input variables | ā |
| 2 | Model 1 | CV, CCI | EAC | 3 | Model 2 | CV, subcontractor billed index, change order index | EAC | 4 | Model 3 | CV, CPI, owner billed index, CCI | EAC | 5 | Model 4 | CV, subcontractor billed index, owner billed index, change order index, CCI | EAC | 6 | Model 5 | CV, CPI, SPI, subcontractor billed index, change order index, CCI | EAC | 7 | Model 6 | CV, SV, CPI, SPI, change order index, CCI, climate effect index | EAC | 8 | Model 7 | CV, SV, CPI, SPI, subcontractor billed index, owner billed index, change order index, climate effect index | EAC |
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