The first draft is easy to produce, but it may not pass the quality inspection.
If you know how to write, and if you work hard and are efficient, it will be about seven or eight. If you don’t work hard or don’t know how to describe it at all, it is difficult to say that you can submit two or three submissions a month.
I think doing this requires some basic understanding of technology. In addition to understanding the content stated in the technical briefing book, if you can understand the implicit information, you can use it to enrich the instructions. Sometimes the case may involve a direct interview, and you need to understand what you need to know. Sometimes you need to understand the functions of each component in the structure and analyze the advantages and disadvantages. This may be quite different for different people. Once you know the plan, the only thing left is to describe the problem. A simple case may only be written in a few sentences, but a complex structure requires patience to express the structure sentence by sentence. Drawing also requires some basic drawing skills. Although customers usually provide drawings, they often need to make some modifications to the given drawings.