Eliete dos Reis

O processo decisório descrito pelo indivíduo e representado nos sistemas de apoio à decisão

This study aimed to check if a Decision Support System (DSS) reproduces the process of human decision. For this, we used the fundamental elements of the Saatys (1991) Analytic Hierarchy Process (AHP), which allows up to five categories of analysis. Accordingly, through a laboratory experiment enacted the task of choosing a notebook in two different ways: with the aid of a DSS; and without the aid of the system, and only the individuals mind to guide the decision while using a think aloud protocol. The results showed significant differences for four of the five categories of analysis. Through hypothesis testing, the only category that had no significant difference in both tasks was the order of choice criteria. Regarding the other categories, statistical evidence did not support the idea that the processes are similar, even if the final decision was the same. For this reason, this studys hypothesis was not confirmed; it is not possible to say that a DSS reproduces the human decision-making process. Regarding the conduct of the decision-maker concerning options for finding information, the process is similar in both tasks, since the decision-maker sought information according to criteria.

USO DE UM SISTEMA DE INFORMAÇÃO EM UMA INSTITUIÇÃO PÚBLICA um estudo de caso

As a result of technological advances and the speed at which information is processed, every moment society starts to count on new technologies developed for the purpose of making the work of individuals easier. Concerning this scenario, this study had the objective to identify the factors which explain the use of a managerial information system from the technology acceptance models, TAM and TTF, considered a consensus in the literature about the theme. Thus, a research of qualitative and descriptive approach was conducted by means of these models which, in most cases, are applied in quantitative analysis. Relating to the method for carrying out this research, a case study was used in a public institution. The analysis of the results which were obtained showed that all the factors evaluated, that is, noticeable utility, facility of use, intention of use and adjustment of technology to task were relevant to explain the use of the system being studied. In this way, it is noticed that the use of an Information System is not only related to the adjustment between task and technology, or to the individuals’ behavior and attitude toward the systems, but also to the combination of these factors (Klopping & McKinney, 2004).

Uma análise do comportamento dos indivíduos em processos de escolha sob pressão de tempo

O objetivo deste estudo foi verificar como a pressao do tempo influencia na qualidade das decisoes. Por meio de um experimento e com o auxilio de um Sistema de Apoio a Decisao foram analisados noventa e oito sujeitos, separados em dois grupos experimentais, de acordo com a incidencia ou nao da pressao do tempo. O teste Qui-quadrado mostrou que a pressao do tempo nao influenciou negativamente na qualidade de decisao. Tambem foi verificado o comportamento dos individuos que, pressionados pelo tempo, buscaram a informacao por criterios e nao por alternativa. Porem, os individuos que iniciaram acessando a informacao por alternativa, apos um determinado tempo, mudaram para a abertura das celulas atraves dos criterios, visando superar o tempo limitado. Pressupostos da Teoria da Imagem justificaram alguns achados, indicando que as imagens previamente estruturadas na mente do decisor, as quais representam suas preferencias, sao uma forma de enfrentar a pressao do tempo.