6 Maintenance refers to the completed development (analysis, design, coding and testing) after work and delivery of a number of software engineering software products of the activities carried out by the software. That software running under the circumstances, with appropriate modifications to the software to adapt to the new requirements, and correct errors found in running. Writing software problem reports, software modifications report. A medium-sized software development phase if it takes time for one to two years, it is put to use in the future, it may be time to run or work for five years to ten years. Then its maintenance phase is run during the past five years to ten years. During this time, it is almost required to address the various problems encountered in the development stage, but also address some of the issues specific to the maintenance work itself. Good software maintenance software development management, not only to get rid of obstacles to the software to work properly, but can also extend it to function, improve performance, in order to bring significant economic benefits. But unfortunately, the software maintenance work is often far less emphasis on the importance of software development work. In fact software development, and software development work compared to the workload and cost of software maintenance much larger. In the actual development process, software development, not from the first step to the last step, but at any stage before the next stage generally have one or more steps in the back. During the test, the problem may require to modify the design of software development professionals, users may need to make some modifications, such as requirements specification. 2 development environment software development environment in Europe known as Integrated Project Support Environment (Integrated Project Support Environment app software development, IPSE). The main components of the software development environment is the software tool. HMI is a unified software development environment for interactive dialogue between users, which is an important mark of quality software development environment. Software products or semi-finished products storage and processing of various software tools produced (such as source code, test data and various documentation, etc.) software environment database is the core software development environment. Ties and mutual understanding between tools through shared data stored in the repository can be realized. Database software development environment is a knowledge-based information database for software workers, the data object is a diversified, with an intelligent nature. Database software used to support a variety of software development tools, especially the work of active or passive automated design tools, such as compilers. More junior SDE database typically contains generic subroutine library, you can process information database restructuring program, module description and interface repository, software testing and correction based on information libraries; more complete SDE database should include the feasibility and demand information archives, archives detailed design phase, test-driven database and software maintenance archives. A further requirement is that software-oriented plan to achieve and maintain automated the entire process, which requires the SDE database system is a smart, one of the more basic result is intelligent software automatically encoded and optimization of the different aspects of software engineering projects perspective of self-analysis and summary. This intelligence results should be re-transformation initiative, learning, knowledge, information, and software-rich accumulation of SDE database. At this time, the software development environment in the appropriate external control or to help software engineers and gradually move to the next highly intelligent and automated. Android software development tutorial _ _ abundance of software development and IT centers by the Shenyang City HSBC and IT center. Shenyang abundance and Information Technology Center (www.4000010001.com) strong, credible, in Shenyang, Liaoning province, such as e-commerce industry has accumulated a large number of loyal customers. The company better work attitude and continuous improvement and innovative ideas will lead HSBC IT center and you hand in hand into the brilliant, for a better future!