Fig. 3

Hierarchical dendrogram of variables in a 4-dimensional representation of the decomposition of the full 13-dimensional dataset. Advanced Security and Massive Scale are shown at opposite ends of the tree connected only by the deepest node, consistent with the view in the 2-d biplot. Measured Service and Geographic Distribution, shown very close together in 2-d, are in fact very distant when considering more relevant dimensions. Internal nodes are labelled with bootstrap percentages indicating the proportion of times in 1000 bootstrap replicates of the CA analysis that a node is observed. All values are <50%, with many values much smaller, indicating that this solution is not robust to bootstrap resampling. i.e. no grouping shown here is strongly supported by evidence