Yes, derived from, but not the same as. I think the best way to think of it is that caching addresses a business requirement, but it is not a business requireme

Yes, derived from, but not the same as. I think the best way to think of it is that caching addresses a business requirement, but it is not a business requirement in itself. The business requirement is e.g., n requests per second, and it is up to the programmer to solve it whatever way they want. The requirement is adequately captured in tests that simply pound the external API to make sure it can keep up, which assumes nothing about how it got its performance.