55Relative precision of emissions abated by an implementation

55  Relative precision of emissions abated by an implementation

 (1) The relative precision of the emissions abated by implementation h for a reporting period is worked out using the formula (equation 28):

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RPA,h means the relative precision (expressed as a percentage) of the emissions abated by implementation h for the reporting period.

t means the critical tabulated student’s t value for the appropriate number of degrees of freedom at the 95% confidence level.

Note: The number of degrees of freedom means the number of data points (measurement time intervals) in the baseline emissions model minus the number of relevant variables in the baseline emissions model minus 1.

SEA,h means the standard error of the emissions abated by implementation h for the reporting period, in tonnes CO2‑e, worked out using equation 29.

|ARP,h| means the absolute value of the emissions abated by implementation h for the reporting period worked out using equation 30.             

Standard error

 (2) The standard error of the emissions abated by implementation h for a reporting period, in tonnes CO2‑e, is worked out using the formula (equation 29):

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SEA,h means the standard error of the emissions abated by implementation h for the reporting period, in tonnes CO2‑e.

nMI,Rep,h means the number of eligible measurement time intervals in the reporting period.

SEB,h means the standard error of the baseline emissions model for implementation h per measurement time interval, in tonnes CO2‑e.

SEinstr,h means the standard error of the measurement uncertainty of the emissions attributable to the accuracy class of the instruments used to measure the values of parameters for implementation h for the reporting period, in tonnes CO2‑e, worked out using standard approaches for assessing the impacts of instrument accuracies on the standard error of emissions calculated (subject to subsection (3)).

 (3) For subsection (2), the value of SEinstr,h:

 (a) must be worked out in relation to instruments used for the purposes of:

 (i) developing the baseline emissions model; and

 (ii) working out total baseline emissions for the reporting period; and

 (iii) working out total measured operating emissions for the reporting period; and

 (b) if the project proponent chooses—may be taken to be zero if the same instruments and the same instrument configurations are used to measure the values of parameters in both the baseline measurement period and the reporting period.