Question: Develop another plan for the Mexican roofing manufacturer described in Examples 1 to 4 (pages 526at"530) and Solved Problem (pages 540at"541). Example 1 Graphical approach to aggregate planning for a roofing supplier A Juarez, Mexico, manufacturer of roofing supplies has developed monthly forecasts for a family of products. Data for the 6-month period January to June are presented in Table 1. The firm would like to begin development of an aggregate plan. Table 1 Monthly Forecasts Month Expected Production Demand per Day Demand Days (computed) Jan. 900 22 41 Feb. 700 18 39 Mar. 800 21 38 Apr. 1,200 21 57 May 1,500 22 68 June 1,100 20 55 A 6,200 124 A Approach a-Plot daily and average demand to illustrate the nature of the aggregate planning