There are several specific problems facing Ace Dairies. There is, for
example, some variation in daily demand, so Roger has to carry spare
stock. He cannot carry too much, as dairy products have a short life
and anything not delivered quickly is thrown away. Roger aims at
keeping this waste down to 2 per cent of sales. There are also
problems maintaining a service during holidays, or when Unigate has
difficulties with their deliveries.