"If you want higher quality, build less stuff." That, in essence, is what Cutter Business Technology Council Fellow Tom DeMarco once said about a daring strategy for quality improvement: reduce quantity. Tom went on to say, "Whatever it is that your organization makes, make less of it. Make less, and choose much more carefully what you make" [1].
The good news is, Tom's advice is something that can be done immediately to reduce defects. Talk about being agile! Quality is inversely proportional to quantity -- simple as that.