When the customer problem means that is it impossible to conduct critical work, the problem associated with the request must be declared as blocking. Checking this field leads to the recalculation of the "Requested resolution date" on the basis of the quality constraints of a possible service contract. Furthermore, a message mentioning the maximum authorized time for sloving the request is dispayed: " The maximum resolution time for this request is ???? ". If no service contract is mentioned on the request, the technician is provided with no message and no reclaculation of the requested resolution date.