Answer:
Order :
1st Customer A
2nd Customer B
3rd Customer C
4th Customer D
Explanation:
The technician should visit the Customer A, B and C in their order of calling time irrespective of their service level package since they are calling to the Critical System failure unit, where some very important and critical failure has taken place, and the problem should be rectified at the earliest without wasting time in order to minimize the damage.
And at last the technician should visit the customer D though he has Platinum service level package because he has called to the Support system malfunction and not to the critical system malfunction unit. The customer D problem is not as critical s the other malfunction. So it can be rectified a little later, because such problem will not cause any harm or damage to the surroundings. Si it can be delayed.
Thus the order is Customer A -- Customer B -- Customer C --- Customer D