What does deseasonalizing a data set accomplish?

		It removes all change in level from the data.
		It removes the progression from one point to another from the data.
		It removes all point-to-point variation from the data.
		It removes the wavelike pattern from the data.

The setup and production time of the members of a product family are given below. What is the net production time of the aggregate unit?

Product	Setup Time/Batch (hour)	Average Batch Size	Production Time/Unit (hour)	Percentage Share of Units Sold
A	8	50	5.6	35
B	6	150	3	10
C	8	100	3.8	10
D	10	50	4.8	10
E	6	100	3.6	20
F	5	75	4.3	15

		10.76
		9.76
		4.60
		5.76

The following table is given. What is the demand forecast for period 13 if the Winter model is used?(P=4)

Quarter	Period	Demand D t	Level	Trend	Seasonal Factor S t	Forecast
			2,593	227
I	1	2,250	2,820	227	0.90	2,536
II	2	1,737	3,046	227	0.60	1,824
III	3	2,412	3,273	227	0.70	2,283
IV	4	7,269	3,500	227	1.80	6,301
I	5	3,514	3,727	227	0.90	3,348
II	6	2,143	3,954	227	0.60	2,367
III	7	3,459	4,181	227	0.70	2,918
IV	8	7,056	4,408	227	1.80	7,947
I	9				0.90
II	10				0.60
III	11				0.70
IV	12				1.80

		8,569
		9,012
		4,989
		9,569