how to trace master data source (table-field)?

Hello All,

Please help, its Urgent!!

I have the following 4 characteristic requirement in BW from PM/PS module.

Master data source (format: table-field)

AFVV-FSAVD - early start date

AFVV-FSEDD - early finish date

AFVV-SSAVD - late start date

AFVV-SSEDD - late finish date

can anyone tell me the procedure, how to find them in R/3 n if there r any standard business content for the same?

Thanks in advance,

JP