As Skylab work progressed, the astronauts complained of being pushed too hard, and ground controllers complained they were not getting enough work done. NASA determined major contributing factors were a large number of new tasks added shortly before launch with little or no training, and searches for equipment out of place on the station. There was a radio conference to air frustrations which led to the workload schedule being modified, and by the end of their mission the crew had completed even more work than originally planned.