TDDs are prepared primarily by the developer for the final development. They are also used by the testing team to write detailed test cases. The following are the key objectives of technical design documentation:
Details of application architecture and design goals
Documentation of the code (high level)
Data flow diagrams
We will discuss the design patterns and things to be cognizant of while putting together a technical design. A technical design is about the solution planning and putting together a skeleton of the technical solution. Putting together good design documentation will help you save development rework and improve the quality of code by allowing you to think through several facets of the solution before you start coding.