Hi Volker,
You can find this information in table - RSPCCHAIN
In this table select CHAIN_ID ,OBJVERS = A ,VARIANTE,EVENTP_START,EVENTP_GREEN,EVENTP_RED
By comparing EVENTP_START , EVENTP_GREEN and EVENTP_RED you will be to figure out sequence of process chain.
It will like below.
EVENTP_STAR EVENTP_GREEN
Blank A
A B
C
That mean your process chain sequence is A - > B -> C
Regards
Raj