が必要 => need; necessary N4
一方では...他方では => On the one hand N2
Compare
必要がある => Need/Need to N4
… 方 => the way to do something N4
Description
一方だ => more and more; continue to ~ N2
一方 => on one hand, on the other hand; although ~ (conjunction) N2
[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
た[方「ほう」]がいい => It would be better to A N4
Can, Should, Must
より~の[方「ほう」]が~ => B is more C than A N4
Comparisons
[一方「いっぽう」]だ => Change A continues, A does not stop N2
Miscellaneous
て仕方がない/てしょうがない => can't help but; very; extremely ~ N2