Reg... spliting of schedule qty(Urgent.......

Question

I have CPD, CSD, and CRD quantities with date given as follows....
CPD date & qty is initially given as 11/9/2008  500,
19/01/2008  500, 23/01/2008  600,  30/01/2008  400.
CSD qty  11/01/08   1000,       22/01/2008   1000
CRD qty  10/01/2008  2000.
Depending on the CPD qty given .....
From the remaining 2 CRD and CSD, we need to find which is having more no of schedule lines. once this is found  the highest which is having more schedule line is selected.
Now subtracting the CPD quantities from the scheduled quantity of the highest we get the result like as follows......
CSD is having 2 schedule lines hence....
1000 - 500  = 500.
  500 - 500  = 0
1000 - 600  = 400.
  400 - 400  = 0
***are the CPD  qty.
similarly CSD qty is splited as follows
2000 - 500  = 1500
1500 - 500 = 1000
1000 - 600 = 400
400 - 400  =  0
Rule of Sequence: The purpose of split is to make the number of schedule lines of CRD, CSD and CPD schedules in harmony. The two with more  schedule lines are split first. Afterwards, the third one is split with the first two which are already in harmony in terms of schedule lines.
Rule of Quantity: The schedule line with larger qty is split into 2 schedules, the qty of the 1st schedule is the same as the qty of the other schedule; the qty of the 2nd schedule is original qty less qty of the 1st schedule. If qty of both schedules are the same, there is no split and both schedules stay put.
Rule of Date: When a schedule is split into 2 schedules, the original date applies to both schedules. 
Now i need to build a code how to subtract the CPD qty  from CRD and CSD qty..
I have developed the code but not working properly for all scenarios..
describe table it_crd lines v_sch_lines_crd.
describe table it_csd lines v_sch_lines_csd.
if v_sch_lines_csd ge v_sch_lines_crd.
loop at  it_csd.
loop at it_cpd.
    v_temp_csd = it_csd-bmeng - it_cpd-zwmeng_cpd.
   it_csd-bmeng = v_temp_csd.
if v_temp_csd ge 0 ."and v_cnt1_csd le v_sch_lines_csd.
*v_cnt_csd =  v_sch_lines_csd - 2.
*v_cnt1_csd = v_sch_lines_csd - v_cnt_csd.
*v_cnt_csd = v_cnt_csd + 1.
*read table it_csd index . "v_cnt1_csd .
it_csd-bmeng = it_csd-bmeng + v_temp_csd.
endif.
endloop.
*if v_cnt1_csd ge v_sch_lines_csd.
*exit.
*endif.
endloop.
endif.
if v_sch_lines_crd le v_sch_lines_csd .
loop at it_crd.
loop at it_cpd.
v_temp_crd = it_crd-wmeng - it_cpd-zwmeng_cpd.
it_crd-wmeng = v_temp_crd.
if v_temp_crd = 0 and v_cnt1_crd le v_sch_lines_crd.
  v_cnt_crd =  v_sch_lines_crd - 2.
  v_cnt1_crd = v_sch_lines_crd - v_cnt_crd.
  v_cnt_crd = v_cnt_crd + 1.
read table it_crd index v_cnt1_crd .
endif.
endloop.
if v_cnt1_crd ge v_sch_lines_crd.
exit.
endif.
endloop.
endif.
can any one suggests the code.
answers will be rewarded with points
Edited by: ms kumar on Jan 18, 2008 7:38 AM

Answer 1

Your help/suggestions in this regard will be greatly appreciated with the points.
Please this is urgent.
~LB