A software engineer may define a process where no further expansion is appropriate because there are no separate sub-processes which may make up the original process. However, the software engineer may still wish to describe the process in more detail as it is a particularly difficult or tricky process. In this case, the software engineer writes down a process description for the process. This can take any form which the software engineer thinks appropriate. Traditional flowcharts could be used or plain English. More common is what is called structured English. This looks like English only it is written more like a computer language. It used to avoid the problem that different people reading the same piece of plain English may understand it in different ways.