What is test design?
This is the stage of the software testing process, at which test scenarios (test cases) are designed and created in accordance with the previously defined quality criteria and testing goals.
Software Testing Documents always play an important role in the Project development/Testing phase. So well-structured companies always try to keep things documented whenever possible, because it’s a better way to rely on rather than on verbal communication. The habit of running documentation will certainly bring a systematic approach to the testing process.
The simplest thing to follow all kinds of documentation is to involve a person in the project from the kick-off phase who understands the project dynamics, domain, objective, and technology. Eventually, QA suits in the best way here.