Cassiopee Example

• Used a combination of inductive and CBR techniques.
• Written using KATE-CBR, by AcknoSoft of Paris, on behalf of an engineering firm owned by General Electric and SNECMA.
• A diagnostic system for aircraft engines: CFM 56-3 engines in Boeing 737s and Airbus A340s.
• The cases came from a legacy database of 23000 engine maintenance reports, built up over 8 years.
• Experienced engineers worked over the cases, eliminating items where there was no diagnosis or mis-diagnosis, and duplicates.
• This left 16000 cases, each with up to 100 features
• Case selection was by a decision tree, generated from the cases.
• This directed the questioning of the user, to provide a set of symptoms, to select cases.
• Integrated with an Illustrated Part Catalogue
• Generates reports of reliability and maintainability using EXCEL
• Uses e-mail to collect maintenance reports world-wide.
• Very fast diagnosis: reduced diagnosis time by 50%
• Won 1st prize for innovative software applications at the European XPS show, Germany, March 1995.