Zeus Computer Chips, Inc., used to have major contracts to produce the Centrino-type chips.

The market has been declining during the past three years because of the dual-core chips, which it cannot produce, so Zeus has the unpleasant task of forecasting next year. The task is unpleasant because the fi rm has not been able to fi nd replacement chips for its product lines.

Here is demand over the past 12 quarters:

2007 2008 2009 I

II III IV 4,800 3,500 4,300 3,000 I

II III IV 3,500 2,700 3,500 2,400 I

II III IV 3,200 2,100 2,700 1,700 Use the decomposition technique to forecast the four quarters of 2010.