P research in new product development (NPD) has conceptualized prototyping as a “design-build-testanalyze” cycle to emphasize the importance of the analysis of test results in guiding the decisions made during the experimentation process. New product designs often involve complex architectures and incorporate numerous components, and this makes the ex ante assessment of their performance diffic...

Component-based software performance engineering (CBSPE) methods shall enable software architects to assess the expected response times, throughputs, and resource utilization of their systems already during design. This avoids the violation of performance requirements. Existing approaches for CBSPE either lack tool support or rely on prototypical tools, who have only been applied by their autho...

In the quest for additional computational power to provide higher software performance, industry have shifted to multi-core processing units. At the same time, many existing applications still contain sequential software; in these cases, multi-core processors would not deeply improve performances and in general would be under-utilized since software running on top of them are not conceived to e...

It is not an overstatement to say that the gap between software design and performance evaluation techniques has caused the misuse of the last ones by software engineers. The UML profile for schedulability, performance and time [13] arose from the intention to close both fields, software engineering and performance analysis. Nevertheless the gap remains, since it is difficult for software engin...

Model-driven performance prediction methods require detailed design models to evaluate the performance of software systems during early development stages. However, the complexity of detailed prediction models and the semantic gap between modelled performance concerns and functional concerns prevents many developers to address performance. As a solution to this problem, systematic model refinem...

SvPablo is a language independent performance analysis and visualization system that supports analysis of applications written in a variety of languages and executing on both sequential and parallel systems. In addition to capturing application data via software instrumentation, SvPablo also exploits hardware performance counters to capture the interaction of software and hardware. Both hardwar...

Background Delayed hypersensitivity to betalactam drugs is one of the most frequently suspected drug allergies. However, it is sometimes difficult to diagnose. Drug challenges are the diagnostic gold standard, but they are costly and complex to organize. In vitro testing could thus represent a valid alternative. The existence of amoxicillin-specific T cells have long been demonstrated, however ...

This chapter presents a case study in performance engineering. The case study consists of a Software Retrieval System based on agents. The system is modelled in a pragmatic way using the Uniied Modeling Language and in a formal way using stochastic Petri Nets. Once the system has been modelled, performance gures are obtained from the formal model. Finally, some concluding remarks are obtained f...

Musicians at all levels of proficiency must deal with performance errors and have to find strategies for avoiding them. Performance errors have been investigated before, but most studies focus on data gathered under laboratory conditions. We present a study conducted on a unique corpus of precisely measured performances: the complete works for solo piano by Chopin, performed on stage by the Rus...

This paper describes a threefold method of testing the performance of an array-based ultrasonic tool for nondestructive testing of spot welds. The tool is described in its capabilities, use, and advantages over existing counterparts. Performance testing is not only described, but results from carrying out the testing are documented as well. The three performance testing methods include the use ...