If waterfall is: specify-design-code-test Then agile TDD with prototype and discard/refactoring is: specify-test-code-design-recode A POC is different f

If waterfall is: specify-design-code-test Then agile TDD with prototype and discard/refactoring is: specify-test-code-design-recode A POC is different from a prototype. A POC helps to define the problem space, but it may also suggest a better initial design (identify useful abstractions): poc-specify-test-design-code