defective rate

基本解释

The invention is capable of effectively controlling geometric precision of rolling ring and reducing defective rate of the rolling ring.
本发明能够有效的控制轧制环件的几何精度，降低轧制环件废次品率。
ip.com
The production of high production cost of new products at the beginning, the number of small, technology is not stable, less skilled, defective rate is higher, so the production cost is high.
生产成本高新产品刚开始生产时，数量不大，技术尚不稳定、不熟练，次品率也较高，因而制造成本较高。
We will try to decrease our defective rate but please give us one more year to achieve this goal. Let us modify the draft accordingly.
我方会尽量降低不良率，请给我们一年的时间，并先修改合约内容。
naked.basic-marketing-strategy.com

Case in point, a user on the MobileRead forums reports being locked out of his account for what was termed an "extraordinary" rate of returns (that is, he returned electronics that arrived damaged or defective).
ENGADGET: Amazon suspends Kindle account after too many product returns