QEST is the leading forum on quantitative evaluation and verification of computer systems and networks, through stochastic models and measurements. QEST has a broad range of interests — the common thread is that the evaluation be quantitative. The range of performance metrics of interest spans classical measures involving performance and reliability, as well as quantification of properties that are classically qualitative, such as safety, correctness, and security. QEST welcomes measurement-based studies as well as analytic studies. QEST welcomes diversity in the model formalisms and methodologies employed, as well as development of new formalisms and methodologies. QEST is keenly interested in case studies highlighting the role of quantitative evaluation in the design of systems, where the notion of system is broad. Systems of interest include computer hardware and software architectures, communication systems, embedded systems, infrastructural systems, and biological systems. Moreover, tools for supporting the practical application of research results in all of the above areas are of special interest, and therefore tool papers are sought.

All submitted papers will be evaluated by at least three reviewers on the basis of originality, technical quality, scientific or practical contribution to the state of the art, methodology, clarity, and adequacy of references. QEST considers five types of papers with additional reviewing criteria (in no particular order):

1. Theoretical: aim to advance our understanding of quantitative evaluation, apply to non-trivial problems and be mathematically rigorous.
2. Methodological and technical: describe situations that require the development and proposal of new analysis processes and techniques. Process structure and the individual steps should be clearly described. If the methodology has already been evaluated with applications, a brief description of the lessons learned would be very helpful.
3. Application: describe and evaluate a novel application (field or system), and compare with previous results (if any).
4. Tools: should motivate the development of the new tools and the formalisms they support. Tool papers need neither discuss their theoretical underpinnings nor their algorithms. Instead, they should focus on the software architecture and discuss its practical capabilities with particular reference to the size and type of model it can handle within reasonable time and space limits.
5. Tool demonstration: are short 4-page papers describing a relevant tool, as well as its features, evaluation, or any other information that may demonstrate the merits of the tool.

We invite submissions of original papers related to the aforementioned topics and in the aforementioned types. Submissions must be in English, Springer LNCS format, and must indicate the above paper type. Papers must be prepared in LaTeX, following Springer's LNCS guidelines. Submitted papers should not exceed 16 pages (4 pages for tool demonstrations). Additional material for the aid of the reviewers (e.g., proofs) can be sent in a clearly marked appendix. Papers must be unpublished and not be submitted for publication elsewhere. PC members, except program co-chairs, may submit papers.

Papers will be submitted electronically using EasyChair online submission system. The revision process will include a rebuttal phase after the first notification to authors and before the PC discussion.

All accepted papers (including tool demonstrations) must be presented at the conference by one of the authors. A best-paper award will be presented at the conference.

The QEST 2015 proceedings will be published by Springer in the LNCS Series. The proceedings will be available at the conference. We plan to host a special issue dedicated to QEST in the open access journal LITES, the Leibniz Transactions on Embedded Systems, see www.dagstuhl.de/en/publications/lites .