The Grwinven program applies the multiplicative control matrices to the inventory pollutants by multiplying the control factors for the pollutants with the annual and average-day emission values. (Reactivity matrices cannot be applied by Grwinven; only the Smkmerge program can apply those, as discussed in Section 2.14.7, “Using Smkmerge to apply the multiplicative and/or reactivity control matrices”.) Grwinven reads in the SMOKE intermediate inventory file and up to 80 control matrices and then applies the control factors from all matrices to the appropriate pollutants.

As discussed in Section 2.13.4, “Applying the growth matrix”, the Grwinven program can also apply growth matrices at the same time it applies control matrices, and the total number of growth and control matrices that can be applied in one run is 80. If desired, the control processing features of Grwinven can be used on a SMOKE intermediate file that has been created by Grwinven with grown and/or controlled emissions, as long as no growth processing features are included in that second pass. (See section Section 2.13.4, “Applying the growth matrix” for discussion of this restriction on applying growth matrices, caused by Grwinven’s addition of the /FYEAR/ header element.)