事後 じご保全 ほぜんではありませんでした
jigohozendewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 事後保全

1. Was not post-maintenance.; Was not retroactive maintenance.; Was not after-the-fact preservation.

Past/Perfective
Negative
Polite
Formal Register
Computing