Here's an interesting video interview James Courtis-Pond of Rosslyn Analytics recently conducted with Rob Morris, the global head of procurement at Clifford Chance. In part 5 Rob describes the difference to his company’s view of the world as they moved from spread sheet analysis of spend to using Rosslyn’s RAPid spend data and contract management service as having “no comparison”. In part 6 he says the ROI has been “tenfold”. 

www.rosslynanalytics.com/Interview_Rob_Morris_Clifford_Chance.php