要は品質の検査を実施して品質を作るのではなく、工程で作り込み確実にすればよいわけです。」という一文を英訳するなら、

The essential point here is that quality can not be achieved simply by conducting quality inspections, but rather that everything ought to turn out satisfactorily if quality is in the first place carefully built into the manufacturing process.

が適切です。