This book constitutes the proceedings of the 17th International Conference on Quantitative Evaluation Systems, QEST 2020, held in Vienna, Austria, in August/September 2020. The 12 full papers presented together with 7 short papers were carefully reviewed and selected from 42 submissions. The papers cover topics such as classic measures involving performance and reliability, quantification of properties that are classically qualitative, such as safety, correctness, and security as well as analytic studies, diversity in the model formalisms and methodologies employed, and development of new formalisms and methodologies.

This book constitutes the refereed proceedings of the 16th International Conference on Formal Modeling and Analysis of Timed Systems, FORMATS 2018, held in Beijing, China, in September 2018. The 14 papers presented in this volume were carefully reviewed and selected from 29 submissions. The papers are organized in the following topical sections: invited papers, temporal logics, distributed timed systems, behavioral equivalences, timed words, and continuous dynamical systems. The aim of FORMATS is to promote the study of fundamental and practical aspects of timed systems, and to bring together researchers from different disciplines that share interests in modeling and analysis of timed systems and, as a generalization, hybrid systems.