Analysing a statistic index in identify change in data behaviour : Apply case in Itaipu Dam

Resumo

The safety of dam is a set of techniques whom to obtain maximum information and data to forecast
possible structures damage. The statistical indexes are multivariable approach that to account information from:
deformation, uplift, shift. The present paper, apply the factorial analysis to modelling a statistical index, in the
purposes of describe jointly the structural status and assess sensibility of index, on the way to complement and
describe the better control chart and quantify the relation between new data and extrapolations of control limits.
The control chart in this paper, it was used as feedback of type : exponentially weighted with moving average. The
analysis through plot, relate amount of occurs and standard deviation manipulated in the exponential regression
between variables. The sensibility brings better interpretation for occurs and in decision- making.