| # | Details |
| 1 | Delivery |
| 2 | After-sales service or availability of spare parts |
| 3 | Previous good experience of the product |
| 4 | Proximity of supplier |
| 5 | Security of supply |
| 6 | General reputation of supplier |
| 7 | The volume of other goods purchased from the same supplier |
| 8 | Good personal relationship with salesman and technical staff of the supplier |
| 9 | Price |