请用准确的英语翻译下列内容。54 合同的签订和实施 对产品要求评审后由销售部代表公司与顾客签订合同或订单。 合同签订后销售员负责将相关文件根据各部门的需要发到相关部门作为生产、采购、检验、交付、出货和成本核算等的依据。销售部应建立《合同台帐》对合同的执行情况进行监督根据需要及时将信息与顾客沟通。 合同执行完毕后销售部整理资料并存档。 55 产品和服务要求的变更 合同及订单签订后任何一方提出的修订

5.4 Signing and Implementation of Contracts After the product requirements review, the sales department will sign contracts or orders with the customer on behalf of the company. After the contract is signed, the salesperson is responsible for sending relevant documents to the corresponding departments according to their needs, as a basis for production, procurement, inspection, delivery, shipment, and cost accounting. The sales department should establish a "Contract Ledger" to supervise the execution of contracts and communicate information with customers as needed. After the completion of the contract, the sales department will organize the documentation and file it.

5.5 Changes in Product and Service Requirements Any revisions proposed by either party after the signing of the contract or order must be approved in writing by the other party before they can be processed, and the corresponding responsibilities will be assumed. When changes to product requirements are needed for certain reasons, the relevant documents (such as contracts) should be modified, and the change requirements should be discussed and agreed upon with the customer. The changed content also needs to be reviewed by relevant department personnel, and the original reviewing department should sign and confirm their review opinions in the "Contract (Order) Change Record". The sales department should notify the relevant departments and personnel in writing of the change results to ensure that they are aware of the modified requirements. Changes will be centrally managed by the technical department. The technical department should ensure that the relevant documented information is modified and that the relevant personnel are aware of the changed requirements.

6 Related Documents 6.1 QD8.1.1-2021 "Quality Operation Planning and Control Specification" 6.2 QD8.5.3-2021 "Customer and Supplier Property Management Specification" 6.3 QD6.1.3-2021 "Emergency Plan Control Specification" 6.4 QD9.1.1-2021 "Customer Satisfaction Survey Specification" 6.5 QD7.4.1-2021 "Information Exchange and Communication Control Specification"

7 Related Records 7.1 QR8.2-01 "Contract (Order) Review Form" 7.2 QR8.2-02 "Contract (Order) Change Review Confirmation Form" 7.3 QR8.2-03 "Contract Ledger" 7.4 QR8.2-04 "Customer Special Requirement Identification Control List