2. Once the engine was complete, Cerny helped both Naughty Dog and Insomniac with their first PlayStation 2 titles, Jak & Daxter: The Precursor Legacy and Ratchet & Clank, respectively, as well as several sequels in both series that followed. During this period, Cerny developed his "Method" approach for game development from his experience on the "dos and don'ts" in the game industry. Cerny's Method has since become a standard practice in the video game development industry. Cerny would continue his consulting with Sony. In 2003, Yoshida had been promoted to vice president of product development at Sony Computer Entertainment America, where the planning of Sony's next console the PlayStation 3 had started. Yoshida again brought Cerny to help plan out a means for the new console to share some of the same functionality as the previous consoles as to reduce the burden and cost for developers. Cerny worked with Sony and Naughty Dog to form the Initiative for a Common Engine (ICE) Team, with part of the team working directly with Sony's hardware developers in Japan to bring about Yoshida's vision. Ultimately the PlayStation 3's new core hardware, the Cell, was difficult to work with, though some of the goals of the ICE Team were implemented. In addition to hardware support, Cerny continued to assist Naughty Dog and Insomniac with their first PlayStation 3 titles, Uncharted: Drake's Fortune from Naughty Dog, Resistance: Fall of Man and Ratchet & Clank Future: Tools of Destruction for Insomniac, as well as for other Sony first-party titles, including God of War III and Killzone 3. PlayStation Lead Architect Around 2007, Sony was looking ahead to the successor to the PlayStation 3, which had not met Sony's sales expectations in competition with Microsoft's Xbox 360, and had contributed to Ken Kutaragi's departure from Sony. A postmortem from the PlayStation 3's development revealed that either the next console would stay with the Cell processor, or move to an x86-based architecture common to personal computers. While the x86 approach would make some parts of development easier, Cerny told Sony this was currently unfavorable to the first-party developers as it would prevent them from accessing low-level functions that many used for extracting as much performance from the console. Cerny spent much of his time in November 2007 researching the history of the x86 architecture, and then proposed a plan to Yoshida for him to take on the