Throwaway Prototype — Why Unwise as Final System

Because non-functional requirements ignored during prototyping cannot be retrofitted, the prototype is undocumented, its structure has degraded, and quality standards were relaxed

Explanation

Delivering a throwaway prototype as the final system is unwise because: non-functional requirements ignored during prototyping cannot easily be added later; the prototype is undocumented; its structure has degraded through rapid change; and organisational quality standards were relaxed during development.