In Part 4 you can look at the two approaches to data analysis, now widely used under the same 'grounded theory' banner. the important thing is that grounded theory is a cognitive process. We all have very different cognitive styles and deciding which approach best suits your own natural way of thinking and processing data is the best advice I can offer. What really matters is that the research as a whole follows the principles discussed in this chapter. We have to walk into the research setting with an open mind but, as Dey point out, 'there is a difference between an open mind and an empty head. To analyse data, We need to use accumulated knowledge, not dispense with it' (Day, 1993, 65). To carry out grounded theory analysis it is necessary to be open to all eventualities and not allow prior theory to drive the data collection nor the analysis. The emphasis must always remain on theory emerging from the data.