This is the 5070th most frequent Japanese word.
要し
"要し" means "to summarize" or "to be essential."
要し is used here to indicate the necessity or requirement of time to complete the project.
このプロジェクトの完成には時間を要します。
Completion of this project requires time.
要し is utilized in this context to express the necessity for care or attention to succeed in an endeavor, such as an exam.
試験に合格するには注意を要します。
Passing the exam demands attention.
要し is applied here to signify that expertise is not a requirement or necessity for the operation of the machine.