DATE DUE
ITEM S21 S22 S23
103 05AUG07 10AUG07 25 AUG07
104 20AUG07 15AUG07 05SEP07
150 07AUG07 20AUG07 02AUG07

Item 103 has a S21 service due on 05Aug07 as the minimum or first in the row.
Item 104 has S22 service due on 15AUG07 as minimum first in its row
Item 150 has S23 service due on 02AUG07 as minimum first in its row

I would like to chart this as the minimum (first) service due for each item with the service that is due for that date (header)
i.e. x axis 103, 104, 150
y axis 02AUG07 up to 15AUG07
z axis S21 or S22 or S23 which ever the minimum and its header is
or labeled somehow with the header information. (S21, S22, S23)

I will probably link information from the sheet to another area to then chart this information.

Any help much appreciated