| Mediating variables | Item | Item description | Source |
| Supplier partnership | SP1 | We feel that we can trust our key suppliers completely | Fynes & Voss (2002) |
| SP2 | Our key suppliers will not sacrifice your interest to profit | Fynes & Voss (2002) | |
| SP3 | The relationship we have with key suppliers is essentially evergreen | Chen & Paulraj (2004) | |
| SP4 | We expect our relationship with key suppliers to last a long time | Fynes & Voss (2002) Chen & Paulraj (2004) | |
| SP5 | The relationship that we have with key suppliers is something we are very committed to | Fynes & Voss (2002) Chen & Paulraj (2004) | |
| SP6 | The relationship that our firm has with key suppliers deserves our maximum effort to maintain | Fynes & Voss (2002) |