controllability of time-aware processes at run time andreas lanz 1, roberto posenato 2, carlo combi...
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Controllability of Time-Aware Processes
at Run Time
Andreas Lanz1, Roberto Posenato2, Carlo Combi2, and Manfred Reichert1
1 Institute of Databases and Information Systems, University of Ulm, Germany2 Department of Computer Science, University of Verona, Italy
Controllability of Time-Aware Processesat Run Time
Contributions:• Modelling time-aware processes– Satisfies a set of temporal constraints e.g. duration
• Check controllability– All temporal constraint – All allowed duration of activity
• An algorithm to check controllability at run timeGap: • No run time support for temporal constraints
Modelling Time-aware Processes
• Map the process model to a process schema– The schema is well-structured (i.e. SESE blocks)– the minimum and maximum number of iterations
for the loops are determined.– At run time process instances are created and
executed based on the process schema – The execution path for each instances are
captured
Time-aware Process Schemas• Activity Duration
• Time needed for execution of an activity.• Time lags between two activities
• Time gap between the beginning of two activities • Cyclic elements
• Time span between activities in a loop• Fixed-date elements
• Specifies when an activity must be started or completed
TPs Can be determined by either domain expert experience or extracted from process logs
Executing time-aware processes
• This paper extends the CSTNU (Conditional Simple Temporal Network with Uncertainty) algorithm by Combi et al. 2012 to check the controllability of a time-aware process schema.
• Their extension includes:– Checking the controllability of the 4 TPs at design
and run time
CSTNU model• To check the controllability each fragment of a
process schema is translated to a CSTNU fragment
As starting time point Ac contingent ending time point AE ending time point
Ordinary constraintsContingent links
Investigations on User Preferences of the Alignment
of Process Activities, Objects and Roles
Agnes Koschmider1, Simone Kriglstein2,3, and Meike Ullrich1
1 Institute of Applied Informatics and Formal Description MethodsKarlsruhe Institute of Technology, Germany{agnes.koschmider,meike.ullrich}@kit.edu
2 SBA Research*, Vienna, Austria3 University of Vienna, Faculty of Computer Science
Contributions • User preferences for the visualisation of an alignment
between process activities, objects and roles models.• Proposed three visualisation techniques
Visualisation Technique no. 1• Single view technique
Node-link representation Integrated overview about the structure of the process
model Connections between objects and roles for each activityClarity and understand ability of the model depends on
the number of elements.
Visualisation Technique no. 2• Multiple views technique
Supports multiple views Object and organization model are displayed in the same
windowThis representation is beneficial for large modelsUsed for PN-based process modelling tools
Visualisation Technique no.3• Multiple views technique in connection with linking
and brushing– Items selected in one model, cause the corresponding
connected items in the other model be highlighted
Questionnaire
• They conducted a questionnaire to explore the usefulness and performance of these visualisations
• Results:– Usefulness of multiple views over single views:
39.39% agree, 48.48% disagree – Multiple views in combination with linking and
brushing is more useful than multiple views