Which of the following is NOT a filtering method mentioned?

The correct choice is based on understanding the types of filtering methods commonly utilized in data management and reporting.

Filters are widely recognized as criteria to include or exclude data based on specific attributes or values. Hierarchies, on the other hand, allow users to navigate through multiple levels of data, providing a structured way to filter data based on predefined levels. Site filters are specialized filters that narrow down data related to specific locations or sites within a dataset, enhancing the relevancy of the data being analyzed.

Data layers, while relevant in the context of data representation or visualization, do not serve the primary purpose of filtering data in the same way the other mentioned methods do. Instead, data layers typically refer to different segments or categories of data that can be visualized concurrently, rather than actively filtering or restricting the data being viewed. Understanding these distinctions is key in recognizing which methods are specifically meant for filtering, thereby validating the choice of Data layers as the correct answer to the question regarding which method is not a filtering method.