Thanks for confirming about TS_Filter.
Ok, I see your preference of LUMPINV not getting changed due to MID_YEAR.
As I see it, there is a discrepancy in the original design and mid-year discounting even for Cases 2.a and 2.b, when interpreting the results. And so, if we should fully extend mid-year discounting consistently also to the LUMPINV reporting, there is an inevitable difference in the interest during construction calculated, and thereby in the LUMPINV values, even though the objective function is equivalent with and without MID_YEAR for Cases 2.a/b. Thus far I have chosen to keep the reporting of LUMPINV (with IDC) consistent with the original design, but your issue prompted me to reconsider that choice.
However, as you did not like my suggestion of improving it, I leave it to you or anyone else to propose how the reporting could be improved in a consistent way. One possibility would be to always use the interpretation according to mid-year discounting, but that might then be considered inconsistent with the original design.
Ok, I see your preference of LUMPINV not getting changed due to MID_YEAR.
As I see it, there is a discrepancy in the original design and mid-year discounting even for Cases 2.a and 2.b, when interpreting the results. And so, if we should fully extend mid-year discounting consistently also to the LUMPINV reporting, there is an inevitable difference in the interest during construction calculated, and thereby in the LUMPINV values, even though the objective function is equivalent with and without MID_YEAR for Cases 2.a/b. Thus far I have chosen to keep the reporting of LUMPINV (with IDC) consistent with the original design, but your issue prompted me to reconsider that choice.
However, as you did not like my suggestion of improving it, I leave it to you or anyone else to propose how the reporting could be improved in a consistent way. One possibility would be to always use the interpretation according to mid-year discounting, but that might then be considered inconsistent with the original design.