determine the requirement type

hi,

i am trying out all the posible search strategies to determine the requirement type.

i am successful in determining the req type against the strategy group and the MRP group which i maintain in the material master.

However, the next search strategy of Material Type is not successful. I need some help as to where is the assignment of req type against material type is done.

Also, the next two search strategies are used ( Item cat + MRP Type & Item Cat ). I know where the assignments are done for this & it has been done correctly. But, this also does not determine the req type.

Kindly help me with the solution.