Vendor evaluation helps you keep away from multiple suppliers. Some of the drawbacks of having numerous vendors are - You may face problems while sharing information. - If you have many vendors, the order volume will be less. Hence there will be no chance of bargaining.  - It is challenging to have a good relationship with all the suppliers. Unfortunately, that leads to less interest by the supplier in your organization, which may affect responsiveness during an emergency.  - Having many vendors consumes more time and money while managing, executing processes, and negotiating contracts.