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  重点领域：网络、安全、电信、无线
  覆盖范围：手动测试、自动化、系统性能
  高效可靠的项目管理

  业内第一套商用自动化测试平台
  可扩展SDK和控制库
  支持CLI和GUI测试自动化

  大型系统级测试
  彻底的安全测试
  综合性能测试
  培训

  软件模块定制（设计、实现和测试）
  严格依照客户要求进行开发
  软件开发基于杰华自有知识产权的数据库
客户反馈
“I would like to personally extend my appreciation to the Sigma team for their stellar work. Its been a great experience working with you in the past few mo......
QA Manager of a company identified by IDC as Market Leader in IPAM/DNS appliance
“I would like to extend to you and the team my highest appreciation for the level of support you have done on this project, with your commitment and support......
Senior Project Manager of a Public company in leading Internet Security Solutions
“Sigma are doing beyond what they were paid for, …, but I also encouraged to see Sigma can make the working model more scalable and more efficient.”.
Senior QA Manager of leading provider of high end IP network infrastructure and security products
The testing you did is very detail. The information helps our RD (to know something they didn’t notice.) It significantly improve our RD's productivity.Than......
Lead engineer of a Public company in leading Internet Security Solutions
Thanks for Sigma engineers’ excellent work. You help us to finish that task so fast.
Lead engineer of leading provider of high end IP network infrastructure and security products
The bugs quality and amount are kept great trend in last several releases. Your great job is very helpful it ensure us release high quality product to our cus......
Lead engineer of leading provider of high end IP network infrastructure and security products
Thank Sigma for the great jobs on latest projects. The results and tests you have done are good. Thanks!
Senior of a Public company in leading Internet Security Solutions
I would also like to extend my appreciation to Sigma's engineer - thanks for the prompt and detailed response.With these valuable information we can easily ge......
Manager of leading provider of high end IP network infrastructure and security products
Thank Sigma very much for your quick actions. I reviewed the log and the code, they look very good. In addition to the improvement we requested, I noticed you......
US-based lead engineer of leading provider of high end IP network infrastructure and security products
Sigma are really committed to perform beyond our stretched goal. We had prepared a hit to wait for them building a VoIP lab from scratch and transferring doma......
Global VOIP solution and equipment vendor
With Sigma's great working, it is hard to find out high failure features in recent running, your are testing very proficient. Also,please work on following fe......
Manager of leading provider of high end IP network infrastructure and security products
It’s a great experience for both of us to learn how to cooperate with each other and the lesson learned is valuable for future cooperation. We very appreci......
QA leader of a Public company in leading Internet Security Solutions
In this release testing, lots of bugs and scripts issues are found. Thanks for Sigma engineer's hard working!
Senior engineer of leading provider of high end IP network infrastructure and security products
Thanks for the those valuable feedback and certainly our company has also learned a lot from the cooperation between 2 companies. Another key point I would l......
Senior Project Manager of a Public company in leading Internet Security Solutions
Thanks for working hard on testing the release candidate and delivering the test reports in time last week, which enables us to make the release on schedule.
Senior QA Manager of leading procider of Internet Security Solutions and Service
I am also looking forward to working together. I really like the status spreadsheet made by Sigma, the status report give me a comprehensive of the project.Th......
Manager of leading provider of high end IP network infrastructure and security products
Congratulations on completing the analysis on (####) platform with ####. Thank Sigma team again for your hard work, and your analysis reports also looks great......
US-based senior engineer of leading provider of high end IP network infrastructure and security products
Thank you very much for the hard work.  We are glad to see the project is going well.
US-based senior engineer of leading provider of high end IP network infrastructure and security products
I want to thank Sigma guys from the bottom of my heart for your dedication and handwork! You guys can get some rest now if you have finished everything you se......
Senior QA Manager of leading procider of Internet Security Solutions and Service
很高兴我们已经开始了2个项目的合作,而且从过程来看杰华有着非常规范的项目开发流程,我们对此表示非常满意.所以经......
Test manager of a leading provider of performance test systems for IP-based infrastructure and services
Hi Li: You are one of best defects hunters in 6.10 testing which was successfully released in 2Q, 2007. Hardworking and good communication as well as exce......
Project manager of a global leading company in providing integrated communications solutions and embedded electronic solutions
I was very pleased with my visit - the team seems very strong, and I was impressed with the facility and Sigma's efforts to make sure that staff is well train......
Vice President of engineering of a company that is a global provider of ENUM-based IP-application routing directory, DNS, and DHCP solutions
I’m really appreciated for Sigma team's warm hard work and co-operation.
Lead system engineer of a major network testing equipment vendor in United States
I feel that your team did the test case development very quickly and some of the test cases were designed very well.
QA manager of leading provider of high end IP network infrastructure and security products
Thank the Sigma team for the great work you did contributing to this release, and every single releases for difference release since the project started last ......
Senior QA Manager of leading procider of Internet Security Solutions and Service
I just received the good news that all our verification of the scripts you have provided us has been completed and they all pass successfully. Great job! Than......
Senior manager of leading provider of high end IP network infrastructure and security products
Thanks your great work to find out critical bugs.
Manager of leading provider of high end IP network infrastructure and security products
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        硅谷工程技术、品质至上、全球服务网络

        我们了解软件工程的生命周期、测试工具开发、海外机构开办、工程架构和测试技术。 我们的产品、服务和解决方案组合从外包测试执行到外包质量保障（QA）无 所不在。 我们交付高品质的结果并提供后续支持。公司的规模正迅速扩大，目前在中国已拥有三个分公司，在美国Santa Clara有一个办事处。Motorola 和 Juniper 均位列我们的客户名单之上。