degree of perfection; level of completion; degree of completion
この作品の完成度は高い。
This work has a high degree of completion.
完成度の低い提案書を出すのは失礼に当たる。
Submitting a poorly completed proposal is disrespectful.
製品の完成度を高めるために繰り返しテストを行った。
Repeated testing was carried out to raise the level of completion of the product.