One area of Citi’s operations where Big Data analytics have been implemented successfully is in customer retention and acquisition. This involves analyzing data and targeting promotional spending using machine learning algorithms. Citi is helping themselves as well as its customers by providing functionality that is keeping it as a firm and its customers protected. So from compliance and cybersecurity to customer service and fraud to marketing and web analytics, many uses need mixed support of Big Data in order to operationalize a wide range of new and critical functionality.Another is to scan transactional records to spot anomalies, which could identify or predict defects –and in the case of customers, incorrect or unusual charges. The costs resulting from these anomalies is far easier to correct if spotted quickly – or even before it happens – through predictive modelling. Simone tells me that across the organization the cost of reworking these “errant data points” has been brought down in some cases by double digits thanks to new methods of Big Data analysis.