Coping with errors encountered in estimation of emissions

In this paper, the authors deal with the development of emission factors whose ultimate use will be in compiling emission inventories for such special case area-wide analyses. They discuss an idealized methodology for deriving such emission factors in the absence of real world constraints. They then identify the practical difficulties in implementing such an idealized methodology and outline several precautions that may be taken to reduce estimation errors. Finally, this paper discusses a specialized rating scheme which may be used to express the degree of confidence in such emission factors and/or inventories.