Hi Gita,
I have tested the ItemConfigurationService ->
<productdefinition:item>TEST_ITEM_01</productdefinition:item>
<common:revision>A</common:revision>
<common:description>Test Item</common:description>
<productdefinition:itemType>MANUFACTURED_PURCHASED</productdefinition:itemType>
<productdefinition:createTrackableSfc>
<!--false-->
</productdefinition:createTrackableSfc>
<productdefinition:quantityRestriction>
<!--ONLY_1-->
</productdefinition:quantityRestriction>
<productdefinition:collectParentSerial>
<!--false-->
</productdefinition:collectParentSerial>
<productdefinition:collector>
<!--false-->
</productdefinition:collector>
<productdefinition:lotSize>1</productdefinition:lotSize>
<productdefinition:quantityMultiplier>
<!--10-->
</productdefinition:quantityMultiplier>
<productdefinition:panel>
<!--false-->
</productdefinition:panel>
<productdefinition:unitOfMeasurement>PCE</productdefinition:unitOfMeasurement>
<productdefinition:preAssembled>
<!--false-->
</productdefinition:preAssembled>
<common:maximumUsage>
<!--10-->
</common:maximumUsage>
<productdefinition:timeSensitive>false</productdefinition:timeSensitive>
in WIP database you will get the table called "ITEM" where the data will be stored when item is created successfully and related more tables are ITEM_ALTERNATE, ITEM_MASTER, ITEM_DPMO, ITEM_GROUP, ITEM_GROUP_MASTER, ITEM_LINK, ITEM_LOCATION.
2) To show the SAP ME data related to Material, Operation, workcenter in custom screen you can use ME PAPI WS also, there are list of ME PAPI WS available to send the data back in ME. You need to open the PAPI WS wsdl URL in wsnavigator and you will find the list of operations for each PAPI WS. As per your requirement if you do not find the particular operation for a service then you can think for ME WIP database table call but before that you need to find out particular table from the list.
Thanks
Chandan