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Chandrasekaran, B. (1988) Generic Tasks as Building Blocks for Knowledge-Based Systems: The Diagnosis and Routine Design Examples. Knowledge Engineering Review, 3 (3).

  author =       "B. Chandrasekaran",
  title =        "Generic Tasks as Building Blocks for Knowledge-Based
                 Systems: The Diagnosis and Routine Design Examples",
  booktitle =    "The Knowledge Engineering Review",
  publisher =    "?",
  pages =        "183--210",
  year =         "1988o.89",

Author of the summary: Jim Davies, 1999, jim@jimdavies.org

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Knowledge based systems based on frames, logic, or rules are too primitive for diagonsis. This paper presents generic tasks, which are to frames and rules, ect., an high-level programming languages are to assembly.

Examples of generic tasks (GTs)

The above building blocks can be used to make a general diagnosis system. Diagnosis is made up of many tasks that differ in input and output. Abstractly it is finding a set of causes for observations. Compiled knowledge systems include, at a minimum, a case memory and knowledge that helps map hypotheses to observations.

The proposed GT arch. classifies plausible hypotheses then takes that and makes a good composite. This helps computationally whenever the knowledge is in the right form: hierarchical, e.g.

There are 4 components to the architecture:

In the classification hierarchy, each node has a confidence. More confident nodes refine themselves by activating sub-nodes. (p10) Knowledge abstraction helps efficiency.

Design hierarchies can be component-subcomponent or function-subfunction based. Specialists in the design hierarchy are responsible for their part, according to constraints. The top node is responsible for the whole design. Each specialist has a collection of plans it can use. deep specialists have fewer, more straightforward plans (p22). Selectors choose plans; Sponsors give opinions.

Properties of the GT:

Summary author's notes:

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Last modified: Wed Mar 22 12:52:28 EST 2000