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.
Asa că am făcut un compromis  apelând la resurse externe care se confruntau cu aceleaşi provocări intelectuale şi cu valoarea comercială importantă pentru clienţi: planificarea transportului de marfă, programul autobuzelor şi  controlul stocurilor.