All time specifications are Central European Time (UTC+1).

📘 On-site proceedings

📘 Author consent

Thursday, 16th of February

09:30 - 10:30

Registration & Welcome

We start at 09:30 with the workshop!
Registration time is for checking the setup and turning up.
10:30 - 12:00

Paper Session I - BPMN

Model Reader Preferences for Semantically Duplicate Elements in BPMN
Daniel Lübke and Volker Stiehl

Enhancing BPMN 2.0 with IoT Modeling Aspects: How Much Language is Enough?
Yusuf Kirikkayis, Florian Gallik and Manfred Reichert

Validation of Algorithmic BPMN Layout Classification
Elias Baalmann and Daniel Lübke

Session chair: Sebastian Böhm
12:00 - 13:00

Lunch Break

13:00 - 14:00

Paper Session II - Process Models

Execution Semantics of Process Models with Data
Maximilian König

Discovering Process Models of Different Granularity from Legacy Software Systems
Marius Breitmayer, Lisa Arnold, Stephan La Rocca and Manfred Reichert

Session chair: Daniel Lübke
14:00 - 14:30

Coffee Break

14:30 - 15:30

Keynote - APIs as Service Activators: Tackling the Hard Parts of Integration Design


Prof. Dr. Olaf Zimmermann
University of Applied Sciences of Eastern Switzerland, Rapperswil

API stands for application programming interface, but might as well mean access to services via protocol for integration. Message-based APIs and the services they expose must be carefully designed to achieve qualities such as composability, efficiency, and evolvability; project context and application domain challenges drive the architectural decisions required regarding communication, coordination and consistency.

This talk introduces a stepwise, incremental and iterative design practice that leverages proven principles and patterns to jumpstart greenfield API design and service engineering. For brownfield scenarios, it proposes an interface refactoring catalog to resolve design smells frequently occurring in practice. Common design tradeoffs in these scenarios are discussed in the form of reusable Architectural Decision Records (ADRs).

📘 Slides
17:15- 19:15

City Tour

Venue: Tourist info, Ernst-August-Platz 8, 30159 Hannover
from 19:30

Dinner at Brauhaus Ernst August (Hannover-Altstadt)

Schmiedestraße 13, 30159 Hannover-Altstadt

Friday, 17th of February

10:00 - 11:00

Transactional vs. Non-Transactional Process Engines


Stephan Haarmann
Camunda GmbH, Germany

The era of monolithic information systems is long gone. Instead, many systems are distributed. Gone are central databases. Gone are central transaction managers. Services are now connected by middleware, such as an event streaming platform or a process orchestrator. Again, architects must decide whether to include a transaction mechanism with ACID properties or to go transactionless. Both have advantages and disadvantages that affect the system design.

This talk discusses how to move from monolithic process applications to distributed ones without a transaction manager. We discuss how this move affects the application design and the process models (business logic). Distributed applications have many advantages, i.e., polyglotism, horizontal scaling, and fault tolerance, but they need to deal with communication overhead, the absence of a central database, and the risk of potential inconsistencies.

11:00 - 11:30

Coffee Break

11:30 - 12:30

Paper Session III - Visionary Session

Towards Progress Determination in Dynamically Evolving Large Process Structures
Lisa Arnold, Marius Breitmayer and Manfred Reichert

Toward Model-driven Planning Support for Construction Processes
Anjo Seidel

Session chair: Robin Lichtenthäler
12:30 - 13:30

Lunch Break

13:30 - 14:30

Paper Session IV - Potpourri Session

Improving Load Balancing of Long-lived Streaming RPCs for gRPC-enabled Inter-service Communication
Christopher Starck and Javad Ghofrani

Immutable Operating Systems: A Survey
Sebastian Böhm and Guido Wirtz

Session chair: Johannes Manner
14:30 - 15:30

Coffee Break