User`s guide

Reporter

Introduction

48 5967–9446

As mentioned, Reporter uses up to sixteen weeks of historical data to

calculate the baseline. In addition, even if the graph itself is conﬁgured

to use 30- or 300-second data, the baseline is calculated from 30-minute

data.

If sixteen weeks of data have not been collected, Reporter uses whatever

data is available. If less than a week of data has been collected, Reporter

warns you that the available data is not sufﬁcient to calculate a baseline,

and the graph is drawn without the baseline envelope.

You can control the baseline calculation by specifying the conﬁdence

level. By default, a 90% conﬁdence level is used, which means that 90%

of past measured values are within the baseline envelope (between the

low and high baseline values). A higher conﬁdence level results in an

envelope that encompasses more of the past data values, typically

resulting in fewer exceptions shown on the graph.

You can also conﬁgure an exception report based on the baseline calcula-

tion; in this case, the report page is printed only when the actual values

are outside the baseline a speciﬁed percentage of the time. For details,

refer to page 139.