@proceedings {2017:benchflow:bpmds,
	title = {Performance Comparison Between BPMN 2.0 Workflow Management Systems Versions},
	year = {2017},
	month = {June},
	publisher = {Springer},
	address = {Essen, Germany},
	abstract = {Software has become a rapidly evolving artifact and Workflow Management Systems (WfMSs) are not an exception. WfMSs{\textquoteright} changes may impact key performance indicators or resource consumption levels may change among different versions. Thus, users considering a WfMS upgrade need to evaluate the extent of such changes for frequently issued workload.  Deriving such information requires running performance experiments with appropriate workloads. 
In this paper, we propose a novel method for deriving a structurally representative workload from a given business process collection, which we later use to evaluate the performance and resource consumption over four versions of two open-source WfMSs, for different numbers of simulated users. In our case study scenario the results reveal relevant variations in the WfMSs{\textquoteright} performance and resource consumption, indicating a decrease in performance for newer versions.},
	keywords = {BenchFlow, BPMN, Performance Regression, Performance Testing, workflow engine, Workflow Management Systems},
	author = {Vincenzo Ferme and Marigianna Skouradaki and Ana Ivanchikj and Cesare Pautasso and Frank Leymann}
}
@conference {benchflow:2016:caise,
	title = {Micro-Benchmarking BPMN 2.0 Workflow Management Systems with Workflow Patterns},
	booktitle = {Proc. of the 28th International Conference on Advanced Information Systems Engineering (CAISE)},
	year = {2016},
	month = {June},
	pages = {67--82},
	publisher = {Springer},
	organization = {Springer},
	address = {Ljubljana, Slovenia},
	abstract = {Although Workflow Management Systems (WfMSs) are a key component in workflow technology, research work for assessing and comparing their performance is limited. This work proposes the first micro- benchmark for WfMSs that can execute BPMN 2.0 workflows. To this end, we focus on studying the performance impact of well-known workflow patterns expressed in BPMN 2.0 with respect to three open source WfMSs (i.e., Activiti, jBPM and Camunda). We executed all the experiments under a reliable environment and produced a set of meaningful metrics. This paper contributes to the area of workflow technology by defining building blocks for more complex BPMN 2.0 WfMS benchmarks. The results have shown bottlenecks on architectural design decisions, resource utilization, and limits on the load a WfMS can sustain, especially for the cases of complex and parallel structures. Experiments on a mix of workflow patterns indicated that there are no unexpected performance side effects when executing different workflow patterns concurrently, although the duration of the individual workflows that comprised the mix was increased.},
	keywords = {BenchFlow, benchmarking, BPMN, Microbenchmark, workflow engine, Workflow Management Systems, workflow patterns},
	doi = {10.1007/978-3-319-39696-5_5},
	url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2016-05\&engl=0},
	author = {Marigianna Skouradaki and Vincenzo Ferme and Cesare Pautasso and Frank Leymann and Andr{\'e} van Hoorn}
}
