~に~かい(~に~回)      => Do ~ times in ~ period N5
Frequency
が必要 => need; necessary N4
に先立って => before; prior to ~ N2
に[先立「さきだ」]って/に[先立「さきだ」]ち/に[先立「さきだ」]つ => Before A occurs/takes place N2
Time, Situation
必要がある => Need/Need to N4
に先駆けて => prior to; to be the first (pioneer); being ahead of ~ N1
[要「よう」]するに => A. In short/put simply, B N2
Adjectival, Descriptions
要するに => in short; in a word; to sum up; to put it simply ~ N2
[必要「ひつよう」]はない => It is not necessary for A to be done N2
Needs, Requirements
に[先駆「さきが」]けて => The earliest, very first in A; Ahead of A, in advance of A N1
Time, Situation