辞書形 => Dictionary form N5
Conjugate verbs
を前提に => On the premise of N1
Premise
~こと請け合い => I guarantee ... N1
Happens next
が必要 => need; necessary N4
必要がある => Need/Need to N4
[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