Hi Sun,
You can check in COOISPI itself. You are trying to check the material as per the alternate BOM.
But this is in the view of components. Activate material description also.
By the way, this report you can add customized filed also. Talk to an ABAP person. This is used case and successful also.
As well refer this link. You will get the answer.
Additional Customer Fields in COOIS output
Regards,
Krishnendu.