On Formal Specification of Design Tasks

Brazier, Frances M. T.; Langen, Pieter H. G. van; Ruttkay, Zsófia; Treur, Jan

doi:10.1007/978-94-011-0928-4_31

Cited by 31 publications

(25 citation statements)

References 7 publications

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“…In this paper, a generic model of design introduced by [16] is used to analyse the role of strategic knowledge within design processes. Refined and improved versions of this model have been used to analyse different types of design (sub-)tasks in a number of domains; for example, conflict management in design [17], re-design of knowledge-based systems [18], elevator configuration design [19] and design rationale [20].…”

Section: A Generic Model Of Designmentioning

confidence: 99%

“…An example of a design strategy for design object description manipulation is to follow the problem-solving method generate-and-test. Figure 1 shows the flows of information between requirement qualification set manipulation (RQSM), design object description manipulation (DODM) and design process co-ordination (DPC), which is responsible for the co-ordination of the overall design strategy (see [16]). The figure also shows the flows of information that represent the input and output of a design process.…”

Section: A Generic Model Of Designmentioning

confidence: 99%

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Strategic Knowledge in Compositional Design Models

Brazier

Langen

Treur

1998

Artificial Intelligence in Design ’98

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Abstract. In interactive design processes, strategic decisions are made at different levels. To support designers, design support systems need to include corresponding strategic knowledge at these levels. In this paper three levels of strategic interaction and strategic knowledge are identified within a compositional model of design. These levels are identified in reasoning about the manipulation of requirements and their qualifications, reasoning about the manipulation of design object descriptions and reasoning about design process co-ordination. Instances of strategic knowledge illustrate the different levels. Keywords:Meta-knowledge, Representing Strategic Knowledge, Compositionality 1.INTRODUCTIONDesign is a complex process, in which different types of knowledge play distinct roles. One aspect of the design process is the nature of requirements and their qualifications (e.g., preference relations between requirements). A second aspect is the nature of a specific design description and its properties. A third aspect is the nature of the domain of design objects. A fourth aspect is the nature of a design process itself, the strategies employed to reason about requirements, design descriptions and their interaction. Each of these aspects of design entails different types of knowledge and different types of reasoning behaviour. Therefore, in interactive design, a design support system should support a designer on the basis of knowledge of requirements and their qualifications, knowledge of design descriptions, knowledge of the object domain and knowledge of the strategies that designers employ.In interaction with a design support system, a designer changes requirements and qualifications of requirements during the design process. For example, a threshold level set in one requirement may be lowered or the qualification of another requirement is changed from 'hard' (meaning that the requirement must be satisfied) into 'soft' (meaning that the requirement is preferred to be satisfied). A decision to implement changes is made on the basis of many factors, including existing (partial) design object descriptions and an increasing level of understanding of specific aspects of the design problem. Which requirements are changed, when and how, depends on the overall design strategy followed. These changes in requirements, together with the overall design strategy, have impact on the different types of strategies in the subsequent design process. The overall design strategy affects the choice of more specific strategies. Modelling such strategies requires strategic reasoning, strategic knowledge, and strategic user interaction of different types and levels (see also [2,3,4,5]).This paper distinguishes different levels of reasoning, knowledge and interaction, and shows how these levels can be modelled at different meta-levels within a compositional architecture. The use of meta-levels for this purpose is also a characteristic of both Hori's * Please note that this paper is an extended version of [1]. and Oshuga's approach ...

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Section: A Generic Model Of Designmentioning

confidence: 99%

Section: A Generic Model Of Designmentioning

confidence: 99%

Strategic Knowledge in Compositional Design Models

Brazier

Langen

Treur

1998

Artificial Intelligence in Design ’98

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“…In the conceptualisation of a generic task model of design [2] shown in The role of a user (e.g. a designer or a client) in interaction with a design support system, based on the above generic task model of design, is often to participate in modifying requirement qualification sets and/or design object descriptions, and the evaluation of the design process.…”

Section: Generic Task Model Of Designmentioning

confidence: 99%

“…A generic task model of design, in which reasoning about requirements and their qualifications and reasoning about design object descriptions are distinguished, has been proposed by Brazier, Langen, Ruttkay, and Treur [2]. This model is based on a logical analysis of design process [3] and on analyses of existing applications [4,5].…”

Section: Introductionmentioning

confidence: 99%

“…from a library) and modification of applicable task models and components; this paper focuses primarily on modification. The generic task model of design proposed by Brazier, Langen, Ruttkay and Treur [2] is shown to incorporate redesign and it will be (re)used to obtain a task model for redesign of compositional knowledgebased systems. The applicability of this task model for redesign will be illustrated for the redesign of a (compositional) diagnostic knowledge-based system.…”

Section: Introductionmentioning

confidence: 99%

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Redesign and reuse in compositional knowledge-based systems

Brazier¹,

Langen²,

Treur³

et al. 1996

Knowledge-Based Systems

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The paper introduces a task model for the redesign of compositional knowledge-based systems based on a generic task model of design. A generic task model of design provides an abstract description of a design task and a generic structure which can be refined for design tasks in specific domains of application. A generic task model of design, shown to incorporate redesign, is presented and refined to a task model for the redesign of compositional knowledge-based systems. The applicability of this task model is illustrated for the redesign of a diagnostic knowledge-based system.

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