| One of the biggest sources of pain in system development is “system integration and test.” This is frequently where projects sailing along with all-green progress reports and Earned Value Management System status summaries start to see these indicators increasingly turn to yellow and then to red. Projects that were thought to be 80 percent complete may be found to still have another 120 percent to go, increasing the relative costs of integration and test from 20 percent of the total to 120/200 = 60 percent of the total.
Managers often look at this 60 percent figure and say, “We need to find a way to speed up integration and test,” and invest in test tools to make testing go faster. But this is not the root cause of the cost escalation. That happened a lot earlier in the definition and validation (or more often the lack of these) of the system’s architecture. Components that were supposed to fit together did not. Unsuspected features in commercial off-the-shelf (COTS) products were found to be incompatible, with no way to fix them and little vendor interest in doing anything about the problems. Nominal-case tests worked beautifully but the more frequent off-nominal cases led to system failures. Readiness tests for safety and security certification were unacceptable. Defect fixes caused regression tests to fail due to unanticipated side effects. Required response times were impossible to meet. And award fees for on-time delivery and expected career promotions faded away. |
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 Liferay 6.2 User Interface Development
Breathe new life into the look and responsiveness of your website with Liferay Portal. With this tutorial you'll learn everything you need to know about this versatile technology. Experience with Java would be a big help.
Overview
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Create eye-catching themes, develop responsive layouts, and write...
| | Application-Specific Integrated Circuits (The VLSI Systems Series)This comprehensive book on application-specific integrated circuits (ASICs) describes the latest methods in VLSI-systems design. ASIC design, using commercial tools and pre-designed cell libraries, is the fastest, most cost-effective, and least error-prone method of IC design. As a consequence, ASICs and ASIC-design methods have become... | | Principles of Constraint Programming
This book is about constraint programming, an alternative approach to programming which relies on a combination of techniques that deal with reasoning and computing. It has been successfully applied in a number of fields including molecular biology, electrical engineering, operations research and numerical analysis. The central notion is that... |
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