The Joint Conference on Knowledge-Based Software Engineering (JCKBSE) was held in September 2000 in the Czech republic. JCKBSE aimed to provide a forum for researchers and practitioners to discuss the latest developments in the areas of knowledge engineering and software engineering. Particular emphasis was placed upon applying knowledge-based methods to software engineering problems. Although initially targeting scientists from Japan, the CIS countries and countries in Central and Eastern Europe, JCKBSE warmly welcomes participants from all countries. The scope of the conference as indicated by its topics has been updated to reflect the recent development in all the three covered areas: knowledge engineering, software engineering, and knowledge-based software engineering.