Jens Heidrich Livres

This book constitutes the refereed proceedings of the 14th International Conference on Product-Focused Software Process Improvement, PROFES 2013, held in Paphos, Cyprus, in June 2013. The 22 revised full papers presented together with 10 short papers and 2 tutorial papers were carefully reviewed and selected from 41 submissions. The papers are organized in topical sections on empirical software engineering, software process improvement, managing software processes, software measurement, decision support in software engineering, safety-critical software engineering, and software maintenance.

Detecting and reacting to critical project states in order to achieve planned goals is one key issue in performing a software development project successfully and staying competitive as a software development company. Software Project Control Centers support the management and controlling of software and system development projects and provide a single point of project control. Currently, many companies are developing their own control centers (typically simple dashboards). However, support for identifying suitable indicators and integrating appropriate custom-tailored control mechanisms into control centers is widely missing. This thesis will introduce the Specula project control approach for goal-oriented composition of project control centers. The focus is on how to describe and combine control components and how to select the right components based on explicitly defined measurement goals. The approach was evaluated in industrial case studies including 9 projects from different domains with different existing project control mechanisms in place. The validation demonstrated, for instance, that 80% of plan deviations and project risks were found earlier than when using a traditional approach to project control. Moreover, 20% of the deviations and risks found by Specula had not been detected at all by the traditional approach.

VoIP-Technologie ist mittlerweile ein integraler Bestandteil der modernen Kommunikationslandschaft. Vorteile, die sich durch die Verschmelzung von Telefon- und Datennetzen ergeben, wie z. B. Kosteneinsparungen durch Reduzierung der Netzwerkinfrastruktur, sorgen für eine stetig steigende Verbreitung. Doch wie sicher ist Kommunikation per VoIP? Am Beispiel der Open Source Telefonanlage Asterisk gibt der Autor einen umfassenden Überblick über die Grundlagen der VoIP-Technologie und untersucht die Risiken, die bei der Verwendung von VoIP bestehen. Den Schwerpunkt der Analyse bildet ein Vergleich zwischen den klassischen VoIP-Protokollen SIP und RTP und dem proprietären Asterisk-Protokoll IAX. Somit richtet sich das Buch an alle Entscheidungsträger, die planen, VoIP bzw. speziell Asterisk, im Unternehmensumfeld oder im privaten Bereich einzusetzen.