Comparações de métodos de triagem por grupos

Abstract

The group screeningmethod consistsin detecting effective elements in a population by the procedure of dividing this population in observation groups and tests these groups. One of the aspects of the theory is to determine the optimum group size that minimizes the expected number of tests. A new procedure was proposed and compared with other procedures established: in two-stage procedure, in several stages and Basic Matrix Method. In the case of existing dependence among the individuais in relation to the fact that they are or not effective, a study of computer simulation was done by means of a program developed with the use of the statistical package SAS® (1990). Several comparisons were accomplished in relation to the expectation and standard deviation ofthe total numberoftests, considering the cost ofthe tests. The new proposed procedures turned out to be economic.