第10讲 系统构建与保障

• Test according to integration requirements
– Application programmer (or team)
• Writes and tests in-house software
Levels of Testing
Stub test - a test performed on a subset of a program.
– Generally have to restructure data as it is populated – Must confirm that data is translated correctly
• Roles
– Application programmers
• Write (or use) special programs to extract data from existing databases and populate new databases
主要内容
• • • • 系统构建与实现 系统测试 实施与上线 维护与优化
Tasks for Completing The Construction Phase
Construction Phase – 1. Build and Test Networks
• Often system build around existing networks. • If system calls for new network functionality, must by built and tested prior to programs that use that it. • Roles
– System users
• Attend training • Accept system
– System owners
• Provide feedback
– System users
• Provide feedback
示例: 实施上线
• 参考实例
主要内容
• • • • 系统构建与实现 系统测试 实施与上线 维护与优化
– Systems analyst
• Develops system test data • Communicates problems and issues
– System builders (database, network, programmers)
• Resolve problems revealed during testing
第六讲 系统实施与维护
饶元 西安交通大学软件学院 2008.6
课程体系结构
企业信息化目标 企业模型架构 IT的作用
软件系统的核心要素
软件系统体系架构
软件系统变革动力
项目管理核心要素
项目过程管理与控制
软件系统模板体系
可行性分析
解决方案分析
需求工程
模型分析
设计方法
系统构造与实现
系统测试
实施与上线
系统维护与优化
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Systems Development, Operation, and Support Functions
Three Important Data Stores
• The repository is a data store(s) of accumulated system knowledge—system models, detailed specifications, and any other documentation accumulated during systems development. • The program library is a data store(s) of all application programs. • The business data is all those data stores of the actual business data created and maintained by the production application programs.
• Roles
– System analyst/Project manager
• Develop a detailed conversion plan
– Systems analyst/designer
• Calculate database sizes and estimate time for installation
– System designer
• Clarifies integration requirements
• Roles
– Systems analyst
• Clarifies business requirements
– Network administrator
• Install software package
– Systems aபைடு நூலகம்alyst
• Clarifies business requirements
Construction Phase – 4. Write and Test New Programs
• Develop in-house programs
– – – – Reuse available software components in library Write new components Test Document
Tasks for Completing The Implementation Phase
Implementation Phase 1. Conduct System Test
• Test network, databases, purchased software, new in-house software, and existing software to make sure it all works together. • Roles
– Systems analyst
• Facilitates • Ensures that business requirements are not compromised
– Systems Analyst
• Build non-corporate, applications-oriented database • Ensures business requirements compliance
– All the events and modules tested as an integrated unit.
Systems test – a test performed on an entire system
– Ensures that application programs written and tested in isolation work properly when integrated into the total system.
– System users
• Provide and/or approve test data
– Network administrator builds and tests
• Network architecture standards • Security
– Database designer/programmer
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Implementation Phase – 2. Prepare Conversion Plan
• Plan for how to convert from old system to new system.
– – – – How to install and populate databases How to train users Finalize documentation Conversion issues
Implementation Phase –
3. Install Databases
• Populate new system databases with existing data from old system
• Build tables, views, stored procedures (if relational database)
– Database administrator
• “Tune” database for optimum performance • Security • Backup and recovery
– System owners and users
• Verify whether or not system operates correctly
• May result in return to construction phase
– Iterate until successful system test
– Individual events or modules of a program. – Testing of an isolated subset of a program.
主要内容
• • • • 系统构建与实现 系统测试 实施与上线 维护与优化
Unit or program test – a test performed on an entire program.
• • • • Plan trainings Conduct trainings Write documentation Help users through the learning period