Before designing for testability, it analyzes testability of the circuit and obtains a test point candidate set TPCS, in which every node may greatly improve the testability of the circuit, GTPP gets the initial bound of global test point placement by using selective tracing.
文中首先采用选择跟踪的思想得到全局测试点插入的初始界限，然后将测试点插入算法形式化为一个分枝界限的问题，得到了一种全局的测试点插入结果。
