Throughout 1956, most members of the lab were assembling and tuning the equipment, and "pure scientists" Hoerni and Noyce carried out individual applied research. Shockley refused to hire technical staff, believing that his scientists should be able to handle all technological processes. After resettlement, he focused on fine-tuning Shockley diodes for mass production, and five employees, led by Noyce, continued the work on a field effect transistor for Beckman Instruments. Shockley refused to work on bipolar transistors, which later was proven a strategic mistake. Because the work on Shockley diodes took so much effort the produced devices were commercial failures.