Useful when representing weights of a set of elements. The Pie chart allows you to display the members or elements of a dimension by a circle divided into sections, each of which represents the proportion of the individual element to the total. In this type of graphs only a single indicator is allowed to be selected, and it does not allow to set parameters for an advanced configuration.
An additional functionality provided by this chart is the ability to perform the drill-down operation. A dimension or perspective of analysis is a set of data organized in the form of levels that form a hierarchy. A typical example of dimension is the TIME dimension, present in any data model. The structure of a TIME dimension could be:
YEAR-->MONTH-->DAY
This dimension has three levels (YEAR, MONTH, DAY), where each one has elements denominated MEMBERS. For example, the members of the MES level will be the month list of the year, and the members of the DAY level will be the days of the month to which they belong.
In this way, the operation of visualizing the days belonging to a given month, is a drill-down operation, that is, show the members of the next level of the hierarchy.
As has been said, this type of graphics allows performing drill-down operations or expansion of a hierarchy. Based on the generated data model, the MARKETS dimension has the following hierarchical structure:
MARKET--> TERRITORY-->COUNTRY-->STATE-->CITY
If you select this dimension in the initial dialog, you will get a graph where the chosen indicator is represented according to the first level of the hierarchy (MARKET).
If you then click on one of the sections of the graph representing the different territories, the graph will reload to show the list of territories belonging to that level. This operation can be executed recursively until reaching the lower level of the hierarchy.
For example, selecting the "Quantity" indicator and the "Markets" analysis perspective, the result is as follows: