You can find some phrases or sentences in the process, so do not copy word to word, use different words instead, except a main objective word, it might be a proper noun.
A use of passive voice is a must.
Sometimes it is difficult write 150 words on diagram, so you will need to ad conclusion by writing something the usefulness about the process.
Some useful Words and Sentences
This device can be used for different purposes.
The messages are sent by a cell phone.
The tracker is used to track the stolen cars.
The papers are checked and then sent back to the university.