Measurement scale | Cronbach’s alpha value | Mean | Standard deviation |
Supply chain integration | 0.683 | 4.35 | 0.554 |
Environmental performance | 0.806 | 3.89 | 0.842 |
Environmental control | 0.745 | 3.70 | 0.961 |
Pollution management | 0.615 | 4.07 | 0.724 |