So I had to compromise with  operational research work, which had the intellectual challenge  that interested me and the commercial value  that was valued by the clients: things like scheduling freight trains, time-tabling buses, stock control, lots and lots of stock control.
Zato sam trebala naći kompromis između razvojnog-operativnog posla, koji mi je predstavljao intelektualni  izazov i zanimao me, i komercijalne vrijednosti koju su cijenili klijenti, što su bile stvari poput izrade rasporeda  teretnih vlakova, voznog reda autobusa, nadzor zaliha, mnogo, mnogo nadzora zaliha.