工艺安全系统应设计成比工艺过程控制系统具有更高的可靠性、可用性和可维修性,由于连续操作,人的不可靠性因素容易影响工艺安全系统。本文所阐述的原则强调对整个系统,包括输入/输出的自动测试和故障诊断的重要性,以致力于减少由于隐性故障引起的失效。单重化元件及软件可编程系统可能产生潜在的危险性故障,因此不适用于安全方面的应用。目前还没有一个大家都认可的对软件可靠性和可用性评审的详细文件模式。建立标准和定量评价的工作还处在进行之中。 Process safety systems should be designed to have higher reliability, availability, and serviceability than process control systems, and unreliable human factors can easily impact the process safety system due to continuous operation. The principles outlined in this article emphasize the importance of automated testing and troubleshooting of the entire system, including input / output, in an effort to reduce failures due to hidden failures. Single-component and software-programmable systems can create potentially dangerous failures and are not suitable for safety applications. There is no one-size-fits-all model for detailed documentation of software reliability and usability reviews. The establishment of standard and quantitative evaluation is still under way.