No, you do not need to create a totally new quality manual. The ISO 17025 Quality Manual serves to document the overall Lab Quality Management System, providing a way to reference and link all the requirements together in one place. Your laboratory can implement ISO 17025 according to Option B. You can use your already established ISO 9001:2015 quality management system (and manual) to demonstrate compliance with the requirements for ISO 17025 clauses 8.2 to 8.9. What is important is that processes must be implemented and maintained in a manner that supports and demonstrates the fulfilment of ISO 17025:2017 Clauses 4 to 7 for all your laboratory activities. This means that the way that the processes (8.2 to 8.9) were established, how they are performed, documented and controlled, must include the activities in Clauses 4 to 7. For example, your audit programme must be revised. You will start with a gap evaluation to determine what new processes you need to include, what mandatory documentation and records you need to “add-on” and include in your Quality Manual.