Since you have the FR acronym, you should use it more often. “Fun. Req.” is fine if that's what you prefer, but you should update your table of acronyms and such accordingly. Also, in Section 5, you often refer to the FRs with the long description, so you can probably switch to using the acronym to make it more consistent.
Since you have the FR acronym, you should use it more often. “Fun. Req.” is fine if that's what you prefer, but you should update your table of acronyms and such accordingly. Also, in Section 5, you often refer to the FRs with the long description, so you can probably switch to using the acronym to make it more consistent.