How to find the value of date char used as exception aggregation reference

Question

Hi BI Gurus,
On a BEx report I need to list three things by material:
1)   the open (not yet delivered) Purchase Order quantities
2)   the PO quantity to be delivered next and
3)   the date that belongs to the next delivery
The model supports these data i.e. for each material I can list all open quantities by Purchase Order / Item / Schedule line and the scheduled delivery dates are also available as a characteristic.
Determining 1) is easy – as the drilldown is fixed (materials only) the open quantities get summarized for all PO-s belonging to the materials.
To determine 2) I used a Calculated KF simply including KF 1) “=Open PO Qty” in the definition and setting Exception Aggregation (first value) with a reference char of the delivery date. This gives back the Open PO Quantity to be delivered first.
My question is about how to determine the 3rd value (actually this is not a KPI but a characteristic value). In other words, for each materials I would need to determine the first among all of the possible delivery date char values of the open PO Items / schedule lines. This is the date the quantity shown in the 2nd KPI will be delivered on.
Does anybody have an idea how to approach this issue?
Thanks for you help in advance,
Attila

Answer 1

Hi Olivier,
Thanks for your suggestion. I got a bit closer with the replacement path formula variable and the CKF. I tried to apply the same logic of KPI 2) but for some reason it did not work. Actually, it delivers the right value but only when 0SCL_DELDAT (Scheduled delivery date) is in the drilldown… But what I need is the first delivery date by Material only, and without this 0SCL_DELDAT drilldown.
Any other ideas?
Thanks and bye,
Attila