Summary SOC 200 - Case Study Report 1: THREE JAYS CORPORATION; Complete solution.

Case Study 1 – Three Jays Corporation Case Study Report 1: THREE JAYS CORPORATION 1. Using the data in case Exhibit 4 and the 2012 annual demand, calculate the EOQ and ROP quantities for the five SKUs scheduled to be produced in the last week of June. How do these amounts compare with those calculated in 2011? Compare the increases in EOQs with the increases in annual demand. (2.5 points) The 2012 Annual Demand is given as Exhibit 5: Monthly Sales Data Label Type Jan Fe b Mar Apr May June July Aug Sept Oct Nov Dec Year Total 3Js Strawberry Jam ,869 2013 566 671 384 631 616 2,868 Marran Markets Raspberry Jelly ,006 379 571 2,856 Kerry's Marts Peach Jam ,970 Dom's Food Stores Blueberry Jam ,211 AAA Grocers Apple/Mint Jelly The EOQ and ROP quantities for the five SKU’s based on 2012 annual demand is given as Total Set up cost (S) Annual Deman d (D) Carryin g Cost (i) % Unit Cost (C) EOQ (cases) ROP (cases) Strawberry Jam 63.7 3869 9% 28. Raspberry Jam 63.7 3006 9% 30. Page 1 of 12 Case Study 1 – Three Jays Corporation Peach Jam 63.7 1970 9% 26. Blueberry Jam 63.7 1211 9% 29.01 243 70 Apple/Mint Jelly 63.7 832 9% 26.32 212 48 As Demand increased from 2011 to 2012, the EOQ’s also increased Deman d (2010) Deman d (2012) Increase in Demand EOQ (2010) EOQ (2012) Increase in EOQ .27% .70% 2335 3006 28.74% .37% .04% .00% .68% .83% .12% .85% So, if Annual Demand doubles, the EOQ will increase by sqrt(2) 2. Brodie is uncertain if the costs presented in case Exhibit 2 are appropriate for determining the EOQs. What changes would you recommend, and why? Should the cost of the three idle part-time workers be included when the production line is down? Using the 2012 annual demand, and your recommendations, recalculate the EOQs for the five SKUs. (2.5 points) In set up costs, the cost of part time workers should also be included, as they are idle at that time. Assuming the salary of each part time worker to be half that of full time worker So, Total salary of 3 part time workers, during idle time of 1 hour = 3*0.5*23.5 = $35.25 So, new set up cost = $63.7 + $35.25 = $98.95 In carrying cost, storage cost was considered as 0%, which should be more because, there is always an opportunity cost of storing one inventory over another. So, considering storage cost as 2%, new carrying cost = 6% + 2% + 3% = 11% Some of the basic assumptions of EOQ are debated • The demand is not uniform throughout the year, which may lead to stock outs • The order of new batch takes time and is not done instantly. For this case, the ROP should be adjusted to include the lead time to place order Page 2 of 12 Case Study 1 – Three Jays Corporation Total Set up cost (S) Annual Demand (D) Carrying Cost (i) % Unit Cost (C) EOQ (cases) ROP (cases) Strawberry Jam 98.% 28. Raspberry Jam 98.% 30. Peach Jam 98.% 26. Blueberry Jam 98.% 29.01 274 70 Apple/Mint Jelly 98.95 832 11% 26.32 238 48 Brodie’s first assignment in his internship is to update the EOQ and ROP quantities for all 141 SKUs, to reflect the current levels of demand (D), because the original calculations were done in 2011 with sales figures from 2010. This task is simp