Requirements-based design evaluation

Frezza, Stephen; Levitan, Steven P.; Chrysanthis, Panos K.

doi:10.1145/217474.217510

Cited by 6 publications

(3 citation statements)

References 10 publications

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“…Most of the past efforts in the area of CAD frameworks are involved in introducing new systems, techniques or extensions in specific areas of design data management [33,46], design meta-data management [14,24,34], and flow, process and tool management [12,16,18,25,43]. WELD, however, concentrates on providing reliable, scaleable connection and communication mechanisms for distributed users, tools and services.…”

Section: Related Workmentioning

confidence: 99%

WELD---an environment for Web-based electronic design

Chan

Spiller

Newton

1998

Proceedings of the 35th Annual Conference on Design Automation Conference - DAC '98

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Increasing size and geographical separation of design data and teams has created a need for a network-based electronic design environment that is scaleable, adaptable, secure, highly available, and cost effective. In the WELD project we are evaluating aspects of the network integration and communication infrastructure needed to enable such a distributed design environment. The architecture of WELD and the components developed to implement the system, together with performance results, are described and evaluated.

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Section: Related Workmentioning

confidence: 99%

WELD---an environment for Web-based electronic design

Chan

Spiller

Newton

1998

Proceedings of the 35th Annual Conference on Design Automation Conference - DAC '98

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“…Design convergence may also be accelerated by (a) making use of trade-offs produced by constraint margins to fix violations and (b) executing design operations that will fix many violations at a time. While heuristics are often used by designers and CAD tools to search for design solutions, design environment work has not focused on providing the constraint-based guidance described above [4,7,8,10,11,12]. A key challenge is the complexity of the required constraint management infrastructure.…”

Section: Introductionmentioning

confidence: 99%

Application of constraint-based heuristics in collaborative design

Carballo

Stephen

2001

Proceedings of the 38th Conference on Design Automation - DAC '01

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Significant acceleration of today's complex collaborative design processes can be achieved if team members are able to apply search heuristics that consider the simultaneous effect of all design constraints. We present the Active approach to Design Process Management (ADPM), whereby designers receive constraint-based feedback that enables them to apply these search heuristics effectively. To evaluate ADPM, we developed a design process evaluation environment called TeamSim. Evaluation results suggest that ADPM can reduce costly design iterations at the expense of extra, less costly, verification tool executions. INTRODUCTIONComplex electronic designs are subject to ever tighter time-tomarket requirements and thus involve ever larger teams, where multiple subsystems are developed in parallel by different groups. Unfortunately, this concurrent design often results in the late detection of conflicts involving multiple subsystems. These conflicts tend to be found upon system integration and thus are very costly to resolve. If one views the design as a group of variables subject to a set of constraints, conflicts can then be seen as violations of constraints. Late conflict detection occurs because, until system integration, each group of designers typically considers only a subset of all constraints relating their subsystem to other subsystems. We can substantially reduce costly rework by aiding consideration of the simultaneous effect of all constraints. The amount and variety of constraints makes computer support for this task essential. For this support to be most powerful, it must give designers direct instructions or "clues" to improve their design space search throughout the design process. This paper presents Active Design Process Management (ADPM), a state-based design process model whereby team members receive constraint-based feedback on their operations and use it to apply design space search heuristics effectively. This guidance reduces and helps resolve conflicts. We also present TeamSim, a design process evaluation environment developed on top of the Minerva III design process manager [3] to evaluate ADPM.Design can be viewed as a search process in a design space restricted by constraints. Constraint-based search heuristics can substantially improve search algorithms [2,6,9] and thus may significantly accelerate design convergence. Several types of constraint-based information can help effectively apply these heuristics, including:• Infeasible design subspaces. The design process may be accelerated by focusing first on areas of the design space that have the smallest subspaces not found to be infeasible.• Strongly constrained subspaces. Another heuristic is to focus first on design subspaces affected by the most constraints.• Efficient conflict resolution strategies. Design convergence may also be accelerated by (a) making use of trade-offs produced by constraint margins to fix violations and (b) executing design operations that will fix many violations at a time. While heuristics are often used...

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“…While previous work has produced techniques to incorporate data and meta-data management [3,8], flow management [13,16], network infrastructure [2], and design process management services [10,14] in electronic CAD environments, they have not directly addressed these issues due, in part, to the complexity of the knowledge needed to generate and evaluate networks of constraints of arbitrary form 1 . However, this previous work, in conjuction with work in constraint-based systems [1,11] and CAD tools, can be used as a basis upon which a suitable constraint management capability can be built.…”

Section: Introductionmentioning

confidence: 99%

Constraint management for collaborative electronic design

Carballo

Stephen

1999

Proceedings of the 36th Annual ACM/IEEE Design Automation Conference

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Today's complex design processes feature large numbers of varied, interdependent constraints, which often cross interdisciplinary boundaries. Therefore, a computersupported constraint management methodology that automatically detects violations early in the design process, provides useful violation notification to guide redesign efforts, and can be integrated with conventional CAD software can be a great aid to the designer. We present such a methodology and describe its implementation in the Minerva II design process manager, along with an example design session.1 Although not focused in electronic design, work in the area of concurrent engineering [7,9] has produced tools that help designers detect and resolve violations of some types of parametric constraints. These tools cannot generate and evaluate constraints of arbitrary form.DAC 99, New Orleans, Louisiana: (c) 1999 ACM 1-58113-109-7/99/06..$5.00 Fig. 9. Constraint and property browser. In the graph, property nodes are dark, constraint nodes are light-shaded, and selected nodes are white. The user is currently examining the information generated by the constraint manager about the "Yield" property and the "resolution requirement" constraint.

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Requirements-based design evaluation

Cited by 6 publications

References 10 publications

WELD---an environment for Web-based electronic design

WELD---an environment for Web-based electronic design

Application of constraint-based heuristics in collaborative design

Constraint management for collaborative electronic design

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