The IRIS network (International Research on the Interior of the Sun) has been running since August 1987 with one to three active sites, and data analysis is now the major task to undertake. After describing how the IRIS data are generated, we present a four step analysis flowchart, starting with raw uncalibrated data, and moving toward 'satellite-like' continuous calibrated, timed, and merged time series which the helioseismological analysis will use. A task-by-task description is presented.