The philosophy of these documents is quite different to the first edition, and more in line with modern thinking and ISO9000, drawing also from the North American ESDA S20:20 standard [7].

• 这些文件的思想体系与第一版截然不同，更加符合当代的思考模式和ISO9000标准，同时也借鉴了北美电子系统设计自动化S20:20标准 [7]。