以六標準差觀念之設計是促進產品設計一次達成六標準差之設計過程，它將設計程序建置在產品定義（Define）、需求衡量（Measure）、規格分析（Analyze）、細步設計（Detail Design）及驗證（Verify），即DMADV的程序。因產品六標準差設計必需與使用需求相關，故一定包含可靠度目標，因此六標準差設計將融合可靠度設計以臻完整；然而，以往可靠度設計以確定性分析，需延至試驗方能驗證是否達成目標（使失效率極小），如此可能使研發時間長，成本增加。本研究探討電子產品以實際應力先以確定性分析訂定初步設計規格，並以功能變異影響最大的溫度規格，利用逆向模擬方式將設定之初步溫度規格進行實際使用氣候溫度模擬確認生存機率（Survival Rate）高之溫度，方能確認為細步設計規格。當進行細步設計時，依可靠度配置而選用之零件溫度規格，以逆向失效樹分析，將實際使用氣候溫度作為虛擬感測器（Virture Sensor），對選用之零件溫度規格模擬生存機率，如生存機率低於1時，則顯示零件選用不適當，系統不安全，可立即修正零件溫度規格直到生存機率為1，方可保證此系統作用安全，不易失效（Failure Free）。本研究經機車之電儀表設計為例，證明利用逆向方法之可行性及可減少設計變更，縮短設計時間之優點。

The designs of six sigma ideas can impel the product design to reach the design processes of six sigma goals during researching and developing. It will design program the construction, in the procedure of DMADV, the products will be defined (Define), the requirements are weighed (Measure), specification analysis (Analyze), the detail design (Design) and design proving (Verify). Because design and must correlate with customer's demand in products six standard deviations. The specification will certainly include the reliability goal. So six sigma design, combine reliability design complete so as to attain. However, reliability design until deterministic analyze, take, prolong to test, can prove, reach goal (make minimum failure rate) in the past Like this, may enable and research and develop time long, cost increase. In this Research probe into electronic product analyze with deterministic temperature specified specification (Nominal Specification) that customer required. And, stipulate the preliminary design temperature specification. Then applied the inverse simulation method, imitate temperature specification that stipulate already in order to climate temperature that use actually. To confirm the temperature of high survival rate, can confirm the specification of detail design. Then while the detail design, dispose the goal in accordance with the reliability, select the part which accords with the temperature specification for use. During this period, set up inverse Fault Tree Analysis. Regard it as the virtue sensor device to use climate temperature actually, to the temperature simulation survival rate selecting the part for using. If lower than 1 in survival rating, reveal the part is selected for use incorrectly, i.e. the system is unsafe. Then the revision part temperature specification, until survival rate is 1. It will guarantee the systematic function of the products is safe, it is difficult to failure happened (Failure Free). This research is applied to the case study with the design of electronics instrument of the motorcycle, ones that proved and utilized inverse method are feasible and advantages of designing change reducibly, shorten the designing time.