更新和维护 IT 服务和解决方案的需求。执行缺陷分析，并相应地进行设计更改。获取或开发用于更改的 IT 服务和解决方案的组件。测试更改。淘汰过时和低效的 IT 解决方案和服务。 Updating and maintaining the requirements for IT services and solutions. Perform defect analysis, and design changes accordingly. Acquire or develop the components for changed IT services and solutions. Test changes. Retire the outdated and inefficient IT solutions and services.