| Name of variable | No of items | Cronbach’s Alpha (α) |
| Internal deriving forces | 7 | 0.880 |
| External driving forces | 7 | 0.722 |
| Green purchasing | 7 | 0.858 |
| Sustainable product and process designs | 7 | 0.835 |
| Sustainable packaging | 5 | 0.705 |
| Sustainable logistics functions | 5 | 0.722 |