According to Wikipedia, "Big Data is an all-encompassing term for any collection of data sets so large or complex that it becomes difficult to process them using traditional data processing applications." Nevertheless, "Advancements in big data analysis offer cost-effective opportunities to improve decision-making in critical development areas such as health care, employment, economic productivity, crime, security, and natural disaster and resource management."
'National Health Service England's Tim Kelsey says "2015 could be a major year for big data in the NHS. This year the government will relaunch care.data, a scheme to allow patient records to be used to improve health services and shared for research purposes.
"I'm sure that most people don't realise the NHS is not currently capable of telling us how many people are treated for chemotherapy, for example, and it's certainly not capable of telling you whether they are treated with a decent outcome," he said.
"There are gaps so big and so dangerous that they have to be filled from a moral as well as a political perspective. So that's what we're going to be doing this year."