"When people do the system-safety analysis, they are focused on the physical parts failing, and they understand that part. But the consequence of that in software today is still not very well understood. "
"If you make an architectural decision that promotes interoperability or modifiability, this can have a negative impact on other qualities such as availability, reliability, security, or performance. Making these trade-offs is one of the hardest parts of architecting and designing any system. "
"Of course the other big question is, do we really need to go into a quantifiable aspect of debt, or is it good enough to just state in the metaphor realm? I tend to believe that if we can't measure it, we can't control it."