10 Get a large dataset unthinkingly dumped into a simple format, structured according to easiest-path-out-of-the-database.
20 Get a simple representation of the data in an arcane format, largely maintaining the original structure.
30 Get a dataset based on iterative processing — normalisation, refactoring — of the original representation.
40 Apply an interpretation of an existing model & extend the existing model.
50 See strings and local interpretations of things.
60 Realise you have bad data.
70 GOTO 10.