Among these, we need to develop techniques that refine information. Flight test results allowed engineers to refine the FBW system. Durango's ability to rework arrangements and tweak sounds helping to refine Albini's song ideas. Attempts to develop and refine OTEC technology started in the 1880s. His focus was on ways to refine oil. Framing is used to construct, refine, and deliver messages. Player feedback helped to refine the game's structure. He continued to rework and refine his classic themes. As development progressed, Apple continued to refine the software's look and feel. It is able to refine gold up to 99.5% purity. Annual conferences were established to help governments refine the process of international arbitration. The company continued to refine the design into 1968. Amateurs can make occultation measurements that are used to refine the orbits of minor planets. It took six years to refine the script and acquire financing. Leitz continued to refine the original design through to 1957.