In: Operations Management
National Scan, Inc., sells radio frequency inventory tags.
Monthly sales for a seven-month period were as follows:
| Month | Sales (000)Units  | 
| Feb. | 19 | 
| Mar. | 15 | 
| Apr. | 8 | 
| May. | 17 | 
| Jun. | 19 | 
| Jul. | 20 | 
| Aug. | 22 | 
b. Forecast September sales volume using each of the
following:
(1) A linear trend equation.(Round your intermediate
calculations and final answer to 2 decimal places.)
  
Yt      
        thousands
(2) A five-month moving average. (Round your answer to 2
decimal places.)
  
Moving average      
       thousands
(3) Exponential smoothing with a smoothing constant equal to
.25, assuming a March forecast of 15(000). (Round your
intermediate forecast values and final answer to 2 decimal
places)
  
Forecast      
       thousands
(4) The naive approach.
Naive approach      
       thousands
(5) A weighted average using .65 for August, .10 for July, and
.25 for June. (Round your answer to 2 decimal
places.)
  
Weighted average thousands