Using the data in Example 3.3, answer the following problems:

A campaign for 500 h is to be run using the following sequence of products: AABCCCAABCCCAABCCC…. Draw an accurate Gantt chart that clearly shows the timing of all equipment for each product. From this chart determine the cycle time for the system (i.e., the time taken to complete the following sequence of batches AABCCC) and then find the number of batches of A, B, and C produced in 500 h.

Repeat the problem but now use the sequence BAACCCBAACCC…. Does the answer change from Part (a)?

What is the solution to the problem if separate, single-product campaigns for A, B, and C (with the same ratios as in the above problems) are used?

Transcribed Image Text:

Example 3.3 Consider three batch processes, producing products A, B, and C, as illustrated in Table E3.3. Each process uses the four pieces of equipment in the same sequence but for different times. Table E3.3 Equipment Times (in Hours) Needed to Produce A, B, and C Product Time in Mixer Time in Reactor Time in Separator Time in PackagingTotal Time 1.5 1.5 2.5 2.5 8.0 1.0 2.5 4.5 1.5 9.5 1.0 4.5 3.5 2.0 11.0 Market demand dictates that equal numbers of batches of the three products be produced over a prolonged period of time. Determine the total number of batches that can be produced in a production cycle equal to one month of operation of the plant using separate campaigns for each product, assuming that a month of operation is equivalent to 500 h (based on 1/12 of a 6000 h year for a three-shift plant operating five days per week). A B с