如果话单采集不可靠，那么计费的原始数据就不可靠，以之为基础的各种计费计算也就不可靠。
If the original data collection is not reliable, it will be impossible to calculate bill reliably based on it.
主要的差异是安全需求，因为大多数应用程序特定的计费和计量与私有或公共云计算是类似的。
The main differences are the security requirements, as most application-specific billing and metering are similar for private or public cloud computing.
尽管如此，对于云计算基础架构的计量和计费，它们非常完善而很有用。
However, they are established and considered usable for metering and billing in cloud computing infrastructures.
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