The investigation found that the manufacturer of the UA1206 motors, Chemical Systems Division of United Technologies, had virtually forgotten proper quality control measures. Due to the Shuttle program, demand for expendable launch vehicles (ELVs) was greatly reduced during the 1980s and manufacturers had been cutting costs, dropping technical personnel, and preparing to phase out ELVs. However, the " Challenger" disaster created a renewed emphasis on ELVs and would see a considerable expansion of the upcoming Titan IV program, which was originally intended for just ten launches.