Load data on system or component level are usually represented as time signals. This applies to field data and rig loads as well as for numerical simulation. The analysis process starts with the detection and correction of irregularities due to possible problems in the measurement process. Often, spikes, drifts or offsets need to be corrected. Next, rainflow-type algorithms and spectral analysis is applied to extract important characteristics of the load signals. Which methods are to be applied with which priority depends on the loads as well as on the system.