四大遵循自我规范机制开展相互审计。
The Big Four firms would audit each other in a system of self-regulation.
BICS规范(包括流行的约束机制)可以在线获得，请参阅参考资料中的链接。
The BICS specifications, which include the popular constraint mechanisms, are available online — see the links in Resources.
对于需求管理和更加规范的筛选机制，这一点仍然十分有用。
They are useful for both requirements management and an additional, more formal, filtering mechanism.
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