In this way the closest training point is identified from one of the possible training technologies and years considered, with the test data point adopting the Technology Life Cycle stage label of the matching training point. The results of this nearest neighbour classification system are demonstrated in Fig. \ref{513876} to Fig. \ref{428185} below, where it can be seen that the technology take-off and other Technology Life Cycle stage transitions correspond well to the observed growth, plateau and decline phases in the extracted technology profiles.