18. Batches of 4 (A-D) products are produced in a flowshop plant) using the equipment process- ing times in Table P3.18 (all times are given in hours). Table P3.18 Equipment Processing Times for Problem 3.18 Equipment Product A Product B Product C Product D 1.5 Mixer Reactor Still 3.0 4.0 3.5 2.5 3.0 4.0 2.0 3.5 2.0 3.0 5.0 2.5 2.5 2.0 5.0 2.0 2.0 5.5 3.0 Dryer Packaging Total volume of product produced in 1 month (m) 10.0 12.0 15.0 5.0 It is decided to operate using a campaign time of 600 h (1 month). The relative numbers of batches to meet current demand are ng = 18 = nie = 3ny. Determine the numbers of each batch of A, B, C, and D for the 600 h campaign time, for the following scenarios: a. Produce each product using single-product campaigns, that is, produce all A, then switch to B, etc. b. Produce multiple products using the sequence AAABBBCCCDAAABBBCCCD.... c. Would the result change for Part (b) if a uis (unlimited intermediate storage) process was used instead of the zw (zero-wait) process used in Part (b)? d. For Part (a), determine the amount of storage needed for each product to meet the demand over the 600 h campaign time. 18. Batches of 4 (A-D) products are produced in a flowshop plant) using the equipment process- ing times in Table P3.18 (all times are given in hours). Table P3.18 Equipment Processing Times for Problem 3.18 Equipment Product A Product B Product C Product D 1.5 Mixer Reactor Still 3.0 4.0 3.5 2.5 3.0 4.0 2.0 3.5 2.0 3.0 5.0 2.5 2.5 2.0 5.0 2.0 2.0 5.5 3.0 Dryer Packaging Total volume of product produced in 1 month (m) 10.0 12.0 15.0 5.0 It is decided to operate using a campaign time of 600 h (1 month). The relative numbers of batches to meet current demand are ng = 18 = nie = 3ny. Determine the numbers of each batch of A, B, C, and D for the 600 h campaign time, for the following scenarios: a. Produce each product using single-product campaigns, that is, produce all A, then switch to B, etc. b. Produce multiple products using the sequence AAABBBCCCDAAABBBCCCD.... c. Would the result change for Part (b) if a uis (unlimited intermediate storage) process was used instead of the zw (zero-wait) process used in Part (b)? d. For Part (a), determine the amount of storage needed for each product to meet the demand over the 600 h campaign time