Table 4

Correlation categorial–numerical variables using correlation ratio

Categorial variables 1–15Numerical variables 1–11
1234567891011
1. Supplier0.620.210.190.830.570.580.570.240.180.21 
2. Receiving address0.220.140.150.520.270.280.280.17 0.13 
3. Item group0.26  0.470.230.250.24    
4. Schedule demand year 0.710.74        
5. Schedule demand week 0.430.34    0.140.110.160.12
6. Transport lead time0.12  0.240.150.130.13 0.11  
7. Pick-up frequency   0.350.240.210.21    
8. Phase-in/out-week           
9. Holiday week           
10. Car Model A   0.370.260.270.26    
11. Car Model B   0.480.300.310.31    
12. Car Model C   0.440.240.250.25    
13. Car Model D   0.520.270.280.28    
14. Car Model E   0.470.230.230.23    
15. Car Model F   0.510.250.260.26    

Note(s): Correlation values < 0.10 are excluded

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