2013年6月,埃文斯(Ralph Evans)在美国北卡罗来纳州高龄去世。他曾经担任权威学术旗舰期刊IEEE Transactions on Reliability主编,是我主编该期刊的前任。回忆起他的信念(credo)与我的想法颇有交集,值得介绍。好的系统,应该让使用者“易于做出正确抉择,难以做出错误抉择”。这个原则适用于工程系统和社会事务(如公务法规、司法程序等)的制定。理想的系统,宗旨明确,操作简单,又可将运作细节交代清楚,便于遵行。然而, In June 2013, Ralph Evans passed away as a senior in North Carolina, United States. He has served as authoritative academic flagship journal IEEE Transactions on Reliability editor, is my editor of the journal’s predecessor. Recalling his credo (credo) and my idea quite a lot, it is worth introducing. Good system, should allow users “easy to make the right choice, it is difficult to make wrong choices ”. This principle applies to the development of engineering systems and social affairs (such as official regulations, judicial proceedings, etc.). The ideal system, a clear purpose, simple operation, but also explain the details of the operation, easy to comply. however,