According to the requirement of the New Accord, the measurement of the Possibility of Default (hereafter PD) is the foundation of the IRB approach and credit risk management in banks.

• 而根据新协议的框架，违约率的测算是内部评级法和银行信用风险管理的基础，在国际银行业风险内部评级体系的演进过程中，现代信用风险度量技术成为违约率测算的一种有用工具。