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Extensive Large Scale Real Time Knowledge Based Systems Design: the Sachem Example - page 7 / 17

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© Marc LE GOC - LSIS - DLS03 Dec 3-4 - Tucson

7

Sachem represents ~415 000 lines of « C » equivalent code

State

Correction

10%

Data Acquisition & Model Processing

20%

State Perception & Diagnosis

33%

Operator Communication

20%

Monitoring

7%

Data Base Management

10%

21 Knowledge Bases

1060 Object Classes

1100 First Order Rules

140 Chronicles

Development:

~30 engineers from 1991 to 1998

150 man.year (~30 m€)

Knowledge acquisition & modeling:

12 Experts, ~6 knowledge engineers

14 man.year over 3 years

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