KRISTEN’S-COOKIE-COMPANY-(A)-英文版案例分析上课讲义

精品文档KRISTEN S COOKIE COMP(A)NYSUNNYProcess Flow Diagramfor Kristen s CookiesMIX SPOONLOAD BAKECOOLPACK PAYThroughput time6+2=8min1+9=10min5min2+1=3minHourly capacity7.5dozen6dozen12dozen20dozenCycle time8min10min5min3minPersonal utilizedKristenRoommateRoommateEquipmentProcessor（ Mixing ）Tray ovenTrayTrayutilizedTray（Spooning）（packing）Question 1The time required to fill the “ rushorder ”is: Process sThroughput Time =26 minutesNOTE: The answer of 26 minutes assumes that there no cookies in the oven, or, if there are cookies in the oven, the remaining baking time is at most 8 minutes. If cookies are in the oven and have a baking time in excess of 8 minutes, then, if the cookies are not removed from the oven, the time required to fill the “ rushorder ” increases above 26min.Question 2Assuming we open four hours each night ， work in progress is the biggestbottleneck for our order processing capacity. Once it is“ up and running” , The process shourly capacity equals.精品文档精品文档If we stood at the end of the process, and, if the process were continually busy, how much time would elapse between the completions of successive units (in this case, successive dozens of cookies? The answer is known as the process cycles time. Because the process hourlys capacity is 6 dozen per hour, the process cycles time is 10min.NOTE: The process completes its first dozen after 26 minutes, and, thereafter, the process completes a dozen every 10 minutes. That is process completes a dozen at the following times: 26, 36, 46, 56, , 216, 226, 236. The process nightlys capacity is 22 dozenSo, Kristen s nightly capacity is actually24dozen.Question 3Recall that the process s cycle time is 10 minutes.From the previous procedure analyzes, we know that Kristen will be idle 20% of the time, and her roommate will be idle 60% of the time.So, the cycle time is 10 minutes.8/10min*100%=80% is busy for filling each order; while the roommate is 40% is busy in each order.Question 4From the previous procedure analyzes, recall that, in each 10-minute cycle, Kristen and her roommate work a total of 12 minutes. Kristen sand the roommate swage is $12/hr or $0.20 /min.Night capacity is 24 dozen.From the case, the materials cost per dozen is $0.60 for ingredients and $0.10 for the box, for a total of $0.70Employee fee is 6$ per hour and estimated profit rate is 20%(20% of investment) 1.2$ per min for people.QuantitiesLaborMaterialTotalCost unit price=Price perunit: dozencostcostcostInvestment costDiscountdozen精品文档精品文档11.20.71.91.92.28No discount21.61.43.01.51.81.8/2.28=80%32.02.14.11.371.641.64/2.28=70%So, 2 dozen with the same cookies will have 8 discount while 3 dozen will have 7 discount.Question 5From the Process Flow Diagramfor Kristen s Cookiesandthe previous procedure analyzes we can know that:Operationsoutput(4 hours per night; it means 240min night)Wash Mix240min/6min per dozen=40dozensBake240min/10min per dozen=24dozensSo, we can easily find , baking time is too long so that restricting the production efficiency,Therefore, it take up the tray, While the spoon need only one task can be completed.精品文档精品文档So, there only need two tray, they can be continuous production.Question 6:The expansion ofproduction capacity analysis: The bottleneck of theproductionprocess depends on the oven, If they want to expand production capacity, they must addan oven in production planning. Following:Operationsoutput(4 hours per night; it means 240min night)Wash Mix240min/6min per dozen=40dozensInput the tray240min/2min per dozen=120dozenBake240min/10min per dozen*2=24dozens*2=48 dozensCool240min/5min per dozen=48 dozensPackpayment240min/3min per dozen=80 dozensSo, Wash Mix has become a new bottleneck, The process s new hourly capacity is thenew bottleneck s hourly capacity7.5 dozen per hour. they maximum output ofthe link is40 dozens,compared to the previous 24 dozens,that has been optimized.From question 4,we assume the total profit is 20% .total costs is 1.9$ per dozen, net margin is 0.38$ per dozen, total profit is 2.28$，night capacity is 9.12$.so, they total margin is 15.2$ per night.精品文档精品文档Therefore, an oven to rent cannot be more than 6.08$（15.2-9.12） .精品文档