人們為因應天災地變，防災救難及緊急保安逃生設備，是家庭必備的器材。而逃生器材中，最常使用的就屬緊急照明燈及手電筒，然一般家庭都會準備手電筒，但是當遇上停電時，常會找不到手電筒，或是找到手電筒卻沒電可使用，無法達到逃生照明的效果。開關是每一個家庭（房子）必要的電源控制元件，幾十年來它一直都只是很簡單的電源開與關的功能。本文的個案研究係應用價值工程方法對家庭開關加以設計創新。探討在新型開關創新開發過程中如何應用價值工程方法，設計研發新型開關創新專案。藉由產品發想經過價值工程方法的應用，將幾項單獨功能的產品，重新組合加以設計成為多功能結合為一體的創新產品，提升產品經濟價值，並符合使用者對新型開關的需求。

Recent years, increased amount of natural disasters, such as floods, earthquakes, and tsunamis, have caused numerous property and human casualties, and therefore, people are more aware of household emergency equipment. Emergency light devises and electric torches are the common household emergency equipment; however, during emergency situations people usually cannot find their emergency equipment and even if they did, it is usually out of battery. Thus, the study focuses on synergizing the function of power switch with emergency light source for power switch devices in order to improve cost-effective value and meet customer demands. The study is based on the systematic method of Value Engineering (VE), which values the system's output and optimizes the performance (function) and costs. Through this technology, we have improved the overall performance and outcome of the designed product, maximized budgets, reduced product life cycle costs, and created better working relationships.