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Requirements are the initial and basic building blocks combining processes in a product's life-cycle. The article describes a field study with data from 246 industry projects in the domains of software platforms, embedded systems and software applications. The study reveals that four life-cycle techniques must be used simultaneously to achieve tangible performance improvement measured by schedule adherence. Each technique is discussed using concrete, practical experiences.This article is part of a special issue on requirements engineering

RESUMEN

There are important legal aspects involved in using open source software in commercial products. Here are answers to common questions on how to handle these issues to mitigate risks.