Metodologia Mactac : aquisição de conhecimento tácito coletivo para auxiliar no diagnóstico de causa raiz de defeito em processos industriais utilizando sistema especialista.

Abstract

The work presents the development of a methodology called as MACTAC - Methodology for the Acquisition of Tacit Knowledge Collective designed to promote the elicitation of tacit knowledge in order to make it explicit applied in industrial manufacturing process. The methodology was applied to stakeholders with the metal packaging assembly process, the mechanics of a metal company located in southern Brazil. For the knowledge process of acquisition and mapping of attributes and values to feed the knowledge base of an expert system techniques were used to improve processes such as Brainstorming, Pareto charts and Ishikawa Diagram associated with knowledge elicitation techniques, such as Unstructured interview, Classification of chips,Technical Observation, Limitation of Information and Protocol Analysis. To structure the methodology, we used the Sistemographytechnique, which calls f systems thinking as a means of observation and modeling of complex phenomenal of objects in organizations. Based on the production rules elaborated through the methodology, were feed two knowledge bases with the same production rules, an expert system in a non-probabilistic (EXPERT SINTA), and the other in a probabilistic expert system ( NETIC) with purpose of carrying out a compare of the results found in expert systems. The expert systems to perform systematic analysis of responses from those involved in the process of assembling the pack while the defect is identified to support the user in diagnosing the root defect cause. The results obtained show the reduce in the indicador of rework, as well as the role of those involved in the production process.