HiTek Computer Services

HiTek Computer Services repairs and services personal computers at its store, and it make local service calls. It primarily uses part-time State University students as technicians. The company has had steady growth since it started. It purchases generic computer parts in volume at a discount from a variety of sources whenever they see a good deal. Thus, they need a good forecast of demand for repairs so that they will know how many computer component parts to purchase and stock, and how many technicians to hire.

The company has accumulated actual demand data shown in the table for repair and service calls for the past year.

\fPART 3: Winter's Model Now, assume the following is the demand for HiTeck Computer Service for the past 4 years: Year Quarter Period Demand Level Trend Seasonal factors 0 L0 = ? To = ? 1 I 1 225 S1 = ? II 2 174 $2 = ? III 3 241 $3 = ? IV 4 727 S4 = ? 2 I 5 351 II 6 214 III 7 346 IV 8 706 3 I 9 412 II 10 277 III 11 255 IV 12 825 4 I 13 549 II 14 438 III 15 431 IV 16 1203 5 I 17 ? II 18 ? III 19 ? IV 20