Following product prioritisation and product discovery, a fully specified product should be designed and ready to handoff to build.
This should be clearly documented in a PRD. The PRD template is here.
Before the PRD is complete and handoff can happen, the following documentation is required :to be included. Guidelines have been created for each, to assist you.
User stories - guidelines
Acceptance criteria - guidelines
Test scripts - guidelines
Design document - guidelines
Note that the expectation for each is much higher than has been the case previously.
Each should be created to a high standard, and leave little margin for error.Guidelines are created for each, to help you to understand what is expected for the documentation for each.