Joseph Hellerstein is Chief Strategy Officer at Trifacta and Professor at UC Berkeley. Working the data so that it can yield to analysis regularly runs into a bottleneck — a human bottleneck. People come at data differently. They name data differently, or it may be incomplete. You have to sort this out. You find oddball data, and you don’t know if it was input incorrectly or if it’s a meaningful outlier. All this precedes analysis. It’s very tedious.