Q1. a. Briefly describe the difference a forecast and a prediction with simple examples. b. Briefly describe any four qualitative types of forecasting you know with examples. c. Using a smoothing constant of 0.9, prepare a forecast for the sixth year in the table. Year Sales Intermediate values 450 495 518 Fn=aYn-1+(1-a)Fn-1 Fn=aYn-1+(1-a)Fn-1 Forecast values 1 2 3 4 5 6 563 584 ?? d. In performing a forecast, general steps are followed. List and explain briefly. [40 marks Q4. a. List all the benefits of group technology (cellular) layout that allows it to assign dissimilar machines into cells to work on products that have similar shapes and process requirements. b. An assembly line operates 7.5 hours per day production time when the output is 1,000 units per day as shown in the table. PRECEDING TASKS TASK TIME (SECONDS) TASK PRICIDING TASKS TIME (SECONDS) 11 A B C D E G H ! A B B 15 24 6 12 18 7 D E F G HI IK 14 7 15 10 K Determine: i. The cycle time. ii. The theoretical minimum of workstations. The efficiency iv. The precedence diagram [30 marks