Supporting effective unexpected exception handling in workflow management systems within organizaional contexts

Tese de doutoramento em Informática (Engenharia Informática), apresentada à Universidade de Lisboa através da Faculdade de Ciências, 2008Workflow Management Systems (WfMS) support the execution of organizational processes within organizations. Processes are modelled using high level languages specifying the sequence of tasks the organization has to perform. However, organizational processes do not have always a smooth flow conforming to any possible designed model and exceptions to the rule happen often. Organizations require flexibility to react to situations not predicted in the model. The required flexibility should be complemented with robustness to guarantee system reliability even in extreme situations. In our work, we have introduced the concept of WfMS resilience that comprises these two facets: robustness and flexibility. The main objective of our work is to increase resilience in WfMSs. From the events demanding for WfMS resilience, we focused on ad hoc effective unexpected exceptions as those for which no previous knowledge exist is the organization to derive the handling procedure and no plan can be a priori established. These exceptions usually require human intervention and problem solving activities, since the concrete situation may not be entirely understood before humans start reacting to the event. After discussing existing approaches to increase WfMS resilience, we have identified five levels of conformity. The fifth level, being the most demanding one, requires unrestricted humanistic interventions to workflow execution. In this thesis, we propose a system to support unrestricted users' interventions to the WfMS and we characterize the interventions as unstructured activities. The system has two modes of operation: it usually works under model control and changes to unstructured activities support when an exception is detected. The exception handling activities are carried out until the system is placed back into a coherent mode, where work may proceed undermodel execution control

Evaluating Groupware for Creative Group Processes – The Case Study of CreativeFlow

The creative potential of teams plays a crucial role in generating the competitive advantage of organizations. We introduce an architecture supporting creative group processes in the context of business processes. Based on the theoretical concept of Pockets of Creativity (Seidel et al. 2010), the architecture aims to balance freedom for creative group work and constraints set by the processes in its environment. The architecture is implemented in the prototype CreativeFlow, integrating a groupware component and a workflow component. The prototype is evaluated in a case study in a TV production company. Free participation in group tasks and support for the structuring of ideas were deemed appropriate for the support of creative group processes. Process structure is mainly imposed by project deadlines that require user notification, also outside the workflow component. Process orientation is a promising approach to increase the efficiency of the creative value creation

Workflow driven Process controlling for unstructured activities

In the day to day business operations of the industry depend on the technology advancements, because of heavy competition between the industries such as manufacturing, sales, software development, etc. Hence a complete control is required for these business processes. This can be achieved with workflow technology. A workflow process is a collection of processing steps also termed as tasks or activities organized to accomplish some business processes. In addition to the collection of tasks, a workflow defines the order of task invocation or conditions under which tasks must be invoked that is control flow and data flow between these tasks. Therefore this paper identifies the importance of workflow and control over these business processes for unstructured activities. Hence the complete state of the art of study was reviewed

Effects of Visualization Techniques on Understanding Inconsistencies in Automated Decision-Making

The automation of business processes and decision-making have received major interest from practice and academia. As automation allows to execute more processes (cases), monitoring automated decision-making is currently evolving into a big data analytics problem for companies. Thus, not only monitoring insights themselves, but also an effective use of such insights become important. In this context, the speed and ability to interpret data is closely related to the visualization of metrics and data. While various approaches for quantitative insights on automated decision-making have been proposed, there is currently no evidence as to how the specific visualization of such metrics helps companies to create more value from their data. In this report, we therefore present the results of an empirical experiment analyzing the cognitive effects of different visualization techniques for quantitative insights on understanding inconsistencies in automated decision-making data

Implementing ALiS: Towards a Reference Architecture for Augmented Living Spaces

Augmented reality (AR) is currently discussed as an approach to promote the personal health of elderly and cognitively impaired people, with spatial AR being a promising, wearable-less solution to enable. an augmented living space (ALiS) that immersively provides and communicates individual, needs-oriented functionalities in the areas of perception, mobility, organization, and medicine. To address the knowledge gap of missing knowledge concerning the implementation of such assistance systems that support autonomy in everyday life, we derived a reference architecture (RA) based on an existing design theory. Our RA contains UML diagrams for components and sequence flows, accompanying text descriptions, and a user interface design. We successfully implemented a prototype to show the RAs feasibility and conducted an expert survey for its general usefulness with positive results. Our contributions add to the prescriptive knowledge base of the community as the results may be adapted by researchers and practitioners

Towards Objectives-Based Process Redesign

Continuously growing and changing multinational companies oftentimes struggle with heterogeneous degrees of standardization.Especially in case of redesigning business processes that have been historically grown over decades, the capability of handlingsemi-structures process is central. Nevertheless, for competitive advantages, it is essential for a company to work on the optimizationof all processes. Existing redesign techniques either focus on completely unstructured or structured processes. TheRedesign Model presented in this paper transforms processes with any level of structuredness into processes with an increaseddegree of standardization. Our technique consists of four main steps: (i) we extract the objectives for an efficient business processredesign from existing literature; (ii) we formulate a list of requirements an innovative redesign model has to fulfill; (iii) wepresent a design science based Business Process Redesign Framework including our Redesign model; (iv) we evaluate our modelshowing its applicability and completeness

Context-Aware Information Retrieval for Enhanced Situation Awareness

In the coalition forces, users are increasingly challenged with the issues of information overload and correlation of information from heterogeneous sources. Users might need different pieces of information, ranging from information about a single building, to the resolution strategy of a global conflict. Sometimes, the time, location and past history of information access can also shape the information needs of users. Information systems need to help users pull together data from disparate sources according to their expressed needs (as represented by system queries), as well as less specific criteria. Information consumers have varying roles, tasks/missions, goals and agendas, knowledge and background, and personal preferences. These factors can be used to shape both the execution of user queries and the form in which retrieved information is packaged. However, full automation of this daunting information aggregation and customization task is not possible with existing approaches. In this paper we present an infrastructure for context-aware information retrieval to enhance situation awareness. The infrastructure provides each user with a customized, mission-oriented system that gives access to the right information from heterogeneous sources in the context of a particular task, plan and/or mission. The approach lays on five intertwined fundamental concepts, namely Workflow, Context, Ontology, Profile and Information Aggregation. The exploitation of this knowledge, using appropriate domain ontologies, will make it feasible to provide contextual assistance in various ways to the work performed according to a user’s taskrelevant information requirements. This paper formalizes these concepts and their interrelationships

A novel workflow management system for handling dynamic process adaptation and compliance

Modern enterprise organisations rely on dynamic processes. Generally these processes cannot be modelled once and executed repeatedly without change. Enterprise processes may evolve unpredictably according to situations that cannot always be prescribed. However, no mechanism exists to ensure an updated process does not violate any compliance requirements. Typical workflow processes may follow a process definition and execute several thousand instances using a workflow engine without any changes. This is suitable for routine business processes. However, when business processes need flexibility, adaptive features are needed. Updating processes may violate compliance requirements so automatic verification of compliance checking is necessary. The research work presented in this Thesis investigates the problem of current workflow technology in defining, managing and ensuring the specification and execution of business processes that are dynamic in nature, combined with policy standards throughout the process lifycle. The findings from the literature review and the system requirements are used to design the proposed system architecture. Since a two-tier reference process model is not sufficient as a basis for the reference model for an adaptive and compliance workflow management system, a three-tier process model is proposed. The major components of the architecture consist of process models, business rules and plugin modules. This architecture exhibits the concept of user adaptation with structural checks and dynamic adaptation with data-driven checks. A research prototype - Adaptive and Compliance Workflow Management System (ACWfMS) - was developed based on the proposed system architecture to implement core services of the system for testing and evaluation purposes. The ACWfMS enables the development of a workflow management tool to create or update the process models. It automatically validates compliance requirements and, in the case of violations, visual feedback is presented to the user. In addition, the architecture facilitates process migration to manage specific instances with modified definitions. A case study based on the postgraduate research process domain is discussed