Like any number of things, they probably want it to work at least as well as they did before.
I see this in product development all the time. A customer has performance requirements. You sell them a product that you've characterized and documented its performance. Then the next time the customer is doing RFQs, you get your product specification back as a requirements specification. Regressions are not allowed even if you previously exceeded their needs. In this case, I suspect the 270 is something similar based on historic failure rates.
I see this in product development all the time. A customer has performance requirements. You sell them a product that you've characterized and documented its performance. Then the next time the customer is doing RFQs, you get your product specification back as a requirements specification. Regressions are not allowed even if you previously exceeded their needs. In this case, I suspect the 270 is something similar based on historic failure rates.