Finally, after signing the contract or agreement with the vendor, it's important to manage the relationship and feedback throughout the project or service. This will help maintain a positive and productive partnership with the vendor and reduce the risk of dissatisfaction, mistrust, or resentment. To do this, you should communicate and collaborate regularly and effectively, using the agreed channels, modes, and frequency of communication. Additionally, you should monitor and evaluate the vendor's performance and quality against the agreed scope, objectives, and standards. Utilize tools, methods, and indicators to track and measure progress and results. Furthermore, you should support and improve the vendor's performance by providing resources, guidance, and assistance. Lastly, recognize and reward the vendor at the end of the project or service with forms, levels, and criteria of recognition. By managing the relationship and feedback in this way, you can foster a long-term and loyal relationship with the vendor while reducing attrition or turnover.