Duration Good (DurGood)

This algorithm looks at the quality of a bounding value of the resample interval to determine what the quality is at the beginning of the interval. If no bounding value exists, the quality is assumed to be bad at the start of the interval. This algorithm only considers truly Good values. Bad values are not considered good when calculating this algorithm.

The algorithm calculates a duration in seconds, the maximum value is defined by the resample interval period and the minimum is zero. In the illustration below the resample interval is 20 seconds.

Each interval’s value is returned with the timestamp of the start of the interval and Qualities are good, calculated.