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

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:

Two

Last

This

Years Ago

Year

Year

I

4800

I

3500

I

3200

II

3500

II

2700

II

2100

III

4300

III

3500

III

2700

IV

3000

IV

2400

IV

1700

Use the decomposition technique to forecast demand for the next four quarters.