How to devloped Triangle report (Insurance Domain)

Hi BI Gurus,

I am in insurance domain and we got new requirement to develop Triangle report using Universe(IDT)+Webi 4.0.requirment is so much confused but I am sure in insurance domain this is comman required report.So I am looking for help if some one in insurance domain and devloped these triangles like Loss caim triangle,policy triangle.

Thanks in advance.

Regards