The National Photovoltaic (PV) Program is sponsored by the U.S. Department of Energy, and includes a PV Manufacturing Research and Development (R&D) project conducted with industry. This project includes advancements in PV components to improve reliability, reduce costs, and develop integrated PV systems. Participants submit prototypes, pre-production hardware products, and examples of the resu...

Starting with the burst of social media, online encyclopedias and sharing resources online, performance testing is more important than ever before. Every venture knows that it should have a fast and a reliable system. Furthermore the business needs to optimize and prepare the system to meet a higher number of users as it grows. A poor performing system can face financial losses and it could als...

ÐAn approach to software performance testing is discussed. A case study describing the experience of using this approach for testing the performance of a system used as a gateway in a large industrial client/server transaction processing application is

This work presents an experience report on the architectural decisions taken in the evolution of a Software Product Line (SPL) of Model-based Testing tools (PLeTs). This SPL was partially designed and developed with the intention of minimizing effort and time-to-market during the development of a family of performance testing tools. With the evolution of our research and the addition of new fea...

Performance related problems play a key role in the Software Development Process (SDP). In order to evaluate the performance of a software architecture we defined and implemented a technique mapping the initial UML model into a performance model afterwards analyzed, implemented into the ArgoPerformance tool. To be interpreted by a computing system it is necessary to make such technique unambigu...

Performance—responsiveness and scalability—is a make-or-break quality for software. Software performance engineering (SPE) [Smith and Williams 2002], [Smith 1990] provides a systematic, quantitative approach to constructing software systems that meet performance objectives. With SPE, you detect problems early in development, and use quantitative methods to support cost-benefit analysis of hardw...

When fixing performance problems in new or existing software or determining whether a proposed system will meet its performance objectives, taking an architectural approach can make it possible to achieve performance objectives more quickly and at a lower cost. This paper describes PASA, a method for performance assessment of software architectures. It was developed from our experience in condu...

Systems using distributed object technology offer many advantages and their use is becoming widespread. Distributed object systems are typically developed without regard to the locations of objects in the network or the nature of the communication between them. However, this approach often leads to performance problems due to latency in accessing remote objects and excessive overhead for commun...

Performance becomes an issue particularly when execution cost hinders the functionality of a program. Typically a profiler can be used to find program code execution which represents a large portion of the overall execution cost of a program. Pinpointing where a performance issue exists provides a starting point for tracing cause back through a program. While profiling shows where a performance...

In this paper we analyze reliability estimation and software performance in software testing. One of the important verification and validation techniques is statistical test which is one of the dynamic techniques. We use statistical test in order to improve software performance. By this work we put sets of data in one case study and by presenting a model-based life cycle we will enhance reliabi...