Venn diagram that shows the three types of variable influences in MB-VIOP according to the type of variation (global, local or unique) that they explain. The three data blocks are represented by three big circles (yellow for D1, blue for D2, red for D3). There are three different types of zones according to how the information is shared (i.e. globally, locally or uniquely) by the variables among the blocks. Variables that belong to D1 are represented by stars, variables of D2 by squares, and variables of D3 by circles. Variables filled in white are important, whereas the ones filled in black are not. Variables labeled with an e are special cases. A further explanation is provided in section "Methods"