They may be useful in identifying edge cases and for determining that a product is functionally complete, but they should be deployed only in the later stages of design validation. 用例可能在確定邊緣情況，以及確定產品在功能上是否完整方面非常有用，但它們只適合在設計驗證的後期採用。
Therefore, the structure optimization used in the light-weight design can determine the shape of the cylinder block easily and decrease the repetitions of design and validation. 結構優化方法用於缸體的等強度輕量化設計中，很容易確定缸體的最佳形狀，並能減少重複設計驗證的次數。
