LYZON Inc. (Headquarters: Bunkyo-ku, Tokyo; President: Ken Fujita) has launched its "All AI Development" service on July 1st. This service utilizes AI across the entire system development lifecycle, from requirements definition, design, implementation, testing, deployment, to operation and maintenance. This service is a development support offering for companies considering integrated AI utilization for new web services, business systems, streamlining standard feature development, specification organization, design, testing, and operation/maintenance. We support the creation of AI-first system configurations tailored to each company's business and services, while clarifying the areas to be handled by AI and those by humans. Background of Service Provision In recent years, with the advancement of AI technologies including generative AI, there has been a growing trend in system development to incorporate AI into each process such as design, implementation, and testing. While AI utilization is expected to improve efficiency in tasks like specification organization, code generation, test case creation, and documentation, there is also a risk of building systems that do not align with objectives and requirements if AI is introduced without clearly defining its scope of use and the judgment areas that should be handled by humans. Furthermore, for corporate web and business systems, there is a challenge where a significant amount of effort is spent on developing standard features, leaving insufficient time to focus on designing business-specific features and customer experiences that should be the priority. A new development structure is needed that streamlines overall development through AI utilization while humans meticulously consider areas directly linked to a company's competitiveness. Against this backdrop, LYZON has launched "All AI Development," an AI-first system development methodology, leveraging the development expertise cultivated through its past experience i