This article considers the interval availability and instant availability of the k-system. A certain relationship between the two types of availability is established. Some lower and upper bounds to interval availability are derived. It also provides a couple of conditions under which the availability of two systems can be compared. Several examples are given to show the complexity of comparisons of availability.

中文翻译：

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关于系统的间隔和即时可用性

本文考虑了间隔可用性和即时可用性ķ-系统。两种可用性类型之间建立了某种关系。导出了区间可用性的一些下限和上限。它还提供了几个可以比较两个系统可用性的条件。给出了几个例子来说明可用性比较的复杂性。