Modelo de avaliação de risco de controle utilizando a lógica nebulosa / Control risk assessment pattern using the fuzzy logic

AUTOR(ES)
DATA DE PUBLICAÇÃO

2005

RESUMO

The assessment of the risks that an entity’s internal control system may fail concerning the identification, measurement, registration and disclosure of economic events, which should be reflected on the entity´s financial statements, is a significant challenge to independent auditors. The methodologies used to achieve those objectives are usually supported by classical logic thinking, in which the components of the risk factors are assessed under the binary form, in other words, under the relatively simplistic assumption that either they are present or not in a certain kind of control or in a certain phase of the process, they either exist or not, they either are carried out or not, and so on. The purpose of this study was to conceive a risk assessment pattern to assess the effectiveness of entity’s internal control system, using the fuzzy logic approach, in order to take into consideration the uncertain and diffuse elements that are actually present, to a representative extent, in the factors of the control risk analyzed by independent auditors in their process of a financial statements audit; The results of this study aim at permitting that broader conclusions may be reached by the auditors, much closer to the realities of the business environment, which may seldom present individual situations where simple “yes” or “no” answers may be given, as required by the classical logic and binary approach for assessment and evaluation The conceptual validation of the conceived model was based in interviews and debateswith experts, relevant bibliography and manuals of audit methodology of audit firms representative of this services industry, and the operational validation was tested from a database of casesof profit oriented entities which had their internal control systems assessed by recognized Brazilian audit firms, processed on the FuzzyTech 5.54 software. This study has concluded that the use of fuzzy logic to support risk assessment models not only eliminates the binary restriction imposed by classic logic, but also allows a numerical and systematic form of treating ambiguous and uncertain concepts, through the application of a psicometric scale, to reflect adjectives such as “good”, “reasonable”, “of great importance” etc, producing, therefore, more ample and closer to reality results.

ASSUNTO(S)

contabilidade independent audit of financial statements fuzzy logic auditoria independente de demonstrações contábeis lógica nebulosa accounting control risk assessment avaliação de risco de controle

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