A method for assessing power system equipment to predict a health of the power system equipment, comprising: acquiring historical sensor data yielded from one or more sensors operably coupled to the power system equipment, the historical sensor data indicative of one or more sensor measurements taken over a first time interval; acquiring historical field test data yielded from one or more field tests performed on the power system equipment, the historical field test data indicative of one or more field test measurements taken over a second time interval; merging the historical sensor data and the historical field test data to form a merged data set, wherein: if a conflict occurs between the historical sensor data and the historical field test data respectively reflecting measurements acquired over an overlapping time interval, the merging comprises: resolving said conflict according to at least one conflict resolution parameter, so as to: give preference to the historical field test data over the historical sensor data if the historical field test data represents a measurement of a characteristic that most closely resembles other temporally proximate measurements of the characteristic, or give preference to the historical sensor data over the historical field test data if the historical sensor data represents a measurement of the characteristic that more closely resembles other temporally proximate measurements of the characteristic; using the merged data set to generate a health profile of the power system equipment, the health profile indicative of a predicted health of the power system equipment. acquiring historical sensor data yielded from one or more sensors operably coupled to the power system equipment, the historical sensor data indicative of one or more sensor measurements taken over a first time interval; acquiring historical field test data yielded from one or more field tests performed on the power system equipment, the historical field test data indicative of one or more field test measurements taken over a second time interval; merging the historical sensor data and the historical field test data to form a merged data set, wherein: if a conflict occurs between the historical sensor data and the historical field test data respectively reflecting measurements acquired over an overlapping time interval, the merging comprises: resolving said conflict according to at least one conflict resolution parameter, so as to: give preference to the historical field test data over the historical sensor data if the historical field test data represents a measurement of a characteristic that most closely resembles other temporally proximate measurements of the characteristic, or give preference to the historical sensor data over the historical field test data if the historical sensor data represents a measurement of the characteristic that more closely resembles other temporally proximate measurements of the characteristic; using the merged data set to generate a health profile of the power system equipment, the health profile indicative of a predicted health of the power system equipment. if a conflict occurs between the historical sensor data and the historical field test data respectively reflecting measurements acquired over an overlapping time interval, the merging comprises: resolving said conflict according to at least one conflict resolution parameter, so as to: give preference to the historical field test data over the historical sensor data if the historical field test data represents a measurement of a characteristic that most closely resembles other temporally proximate measurements of the characteristic, or give preference to the historical sensor data over the historical field test data if the historical sensor data represents a measurement of the characteristic that more closely resembles other temporally proximate measurements of the characteristic; using the merged data set to generate a health profile of the power system equipment, the health profile indicative of a predicted health of the power system equipment. give preference to the historical field test data over the historical sensor data if the historical field test data represents a measurement of a characteristic that most closely resembles other temporally proximate measurements of the characteristic, or give preference to the historical sensor data over the historical field test data if the historical sensor data represents a measurement of the characteristic that more closely resembles other temporally proximate measurements of the characteristic; using the merged data set to generate a health profile of the power system equipment, the health profile indicative of a predicted health of the power system equipment.