GTA: Groupware task analysis — Modeling complexity

Veer, Gerrit C. van der; Lenting, Bert F.; Bergevoet, Bas A.J.

doi:10.1016/0001-6918(95)00065-8

Cited by 119 publications

(42 citation statements)

References 5 publications

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“…Task models, such as those described by ConcurTaskTrees (CTT) (Paternò, 2000) or GTA (Van der Veer et al, 1996), can provide useful support. In terms of granularity, tasks can be elementary tasks (namely, tasks that are considered as a logically atomic entity which cannot be further refined) and structured tasks (namely, tasks whose specification consists in a decomposition and a refinement of a number of logically connected, smaller sub-tasks).…”

Section: Concurtasktrees and Mariamentioning

confidence: 99%

Engineering the authoring of usable service front ends

Paternò

Santoro

Spano

2011

Journal of Systems and Software

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a b s t r a c tThis paper presents a method and the associated authoring tool for supporting the development of interactive applications able to access multiple Web Services, even from different types of interactive devices. We show how model-based descriptions are useful for this purpose and describe the associated automatic support along with the underlying rules. The proposed environment is able to aid in the design of new interactive applications that access pre-existing Web Services, which may contain annotations supporting the user interface development. This is achieved through the use of task models as a starting point for the design and development of the corresponding implementations. We also provide an example to better illustrate the features of the approach, and report on two evaluations conducted to assess the support tool.

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Section: Concurtasktrees and Mariamentioning

confidence: 99%

Engineering the authoring of usable service front ends

Paternò

Santoro

Spano

2011

Journal of Systems and Software

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“…Van der Veer et al [134] created a conceptual framework for the design of an interactive system, which envisioned a three staged modelling methodology. At the first step, the designer creates a first task model (Task Model 1) from the domain knowledge and the work practice.…”

Section: Historical Backgroundmentioning

confidence: 99%

A model-based approach for gesture interfaces

Spano

2011

Proceedings of the 3rd ACM SIGCHI Symposium on Engineering Interactive Computing Systems

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This one goes out to the one I love "People shouldn't have to read a manual to open a door, even if it is only one word long (push/pull AbstractThe description of a gesture requires temporal analysis of values generated by input sensors, and it does not fit well the observer pattern traditionally used by frameworks to handle the user's input. The current solution is to embed particular gesture-based interactions into frameworks by notifying when a gesture is detected completely. This approach suffers from a lack of flexibility, unless the programmer performs explicit temporal analysis of raw sensors data. This thesis proposes a compositional, declarative meta-model for gestures definition based on Petri Nets. Basic traits are used as building blocks for defining gestures; each one notifies the change of a feature value. A complex gesture is defined by the composition of other sub-gestures using a set of operators. The user interface behaviour can be associated to the recognition of the whole gesture or to any other sub-component, addressing the problem of granularity for the notification of events.The meta-model can be instantiated for different gesture recognition supports and its definition has been validated through a proof of concept library. Sample applications have been developed for supporting multi-touch gestures in iOS and full body gestures with Microsoft Kinect.In addition to the solution for the event granularity problem, this thesis discusses how to separate the definition of the gesture from the user interface behaviour using the proposed compositional approach.The gesture description meta-model has been integrated into MARIA, a model-based user interface description language, extending it with the description of full-body gesture interfaces.

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“…In the area of modelling groupware mechanisms Groupware Task Analysis [8] should be mentioned, as it is a method that emphasizes on studying groupware systems and their activities rather than studying single users. It considers three different aspects: agents, which often indicate people, either individuals or groups, but may also refer to systems; work, which can be split into different tasks, with different levels of complexity, from the lowest task level people refer to their work, the 'unit task' (which is often role-related), and complex tasks, which may be split up between agents or roles; situation: the current situation for the performance of a certain task, which involves describing the environment (physical, conceptual, and social) and the objects in such environment.…”

Section: Related Workmentioning

confidence: 99%

Supporting interactive workflow systems through graphical web interfaces and interactive simulators

Bruno

Paternò

Santoro

2005

Proceedings of the 4th International Workshop on Task Models and Diagrams - TAMODIA '05

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The design of workflow systems originated as an attempt to support coordinated data access. The improvement of interaction technology has created an opportunity for more flexible and interactive activities. Tools for modelling tasks in cooperative applications have started to appear. In this paper, we show how to extend one such tool for supporting workflow control in distributed environments through interactive graphical interfaces. In particular, we show how we have created an environment that exploits a workflow server containing a simulator of cooperative task models. This enables the possibility of allowing users with different roles to access the system through interactive graphical Web interfaces obtained using SVG. Users can access from any location where a Web access is available and obtain information regarding the state of a specific workflow instance, their enabled tasks according to the current state, and the history of tasks accomplished with details regarding their performance. Whenever a task is performed, the user can inform the system regarding this, and the simulator will update the state of the procedure and accordingly enable or disable each user's tasks for all the roles involved.

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GTA: Groupware task analysis — Modeling complexity

Cited by 119 publications

References 5 publications

Engineering the authoring of usable service front ends

Engineering the authoring of usable service front ends

A model-based approach for gesture interfaces

Supporting interactive workflow systems through graphical web interfaces and interactive simulators

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