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

KRISTEN’S COOKIE COMPANY (A)
SUNNY
Process Flow Diagram for Kristen’s Cookies
Question 1
The time required to fill the “rush order” is: Process’s Throughput Time =26 minutes
NOTE: 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 “rush order”
increases above 26min.
Question 2
Assuming we open four hours each night，work in progress is the biggest bottleneck for our order processing capacity. Once it is “up and running”, The process’s hourly capacity equals.
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’s cycle time.
Because the process’s hourly capacity is 6 dozen per hour, the process’s cycle 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’s nightly capacity is 22 dozen
So, Kristen’s nightly capacity is actually 24 dozen.
Question 3
Recall 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 4
From the previous procedure analyzes, recall that, in each 10-minute cycle, Kristen and her roommate work a total of 12 minutes. Kristen’s and the roommate’s wage 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 $0.70
Employee fee is 6$ per hour and estimated profit rate is 20%(20% of investment)；
discount.
Question 5
From the Process Flow Diagram for Kristen’s Cookies and the previous procedure analyzes we can know that:
Operations
Wash＆Mix
Bake
output(4 hours per night; it means 240min night)
240min/6min per dozen=40dozens
240min/10min per dozen=24dozens
So, 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.
So, there only need two tray, they can be continuous production.
Question 6:
The expansion of production capacity analysis:The bottleneck of the production process depends on the oven,If they want to expand production capacity, they must add an oven in production planning.Following:
Operations Wash＆Mix Input the tray Bake
Cool
Pack＆payment output(4 hours per night; it means 240min night) 240min/6min per dozen=40dozens
240min/2min per dozen=120dozen
240min/10min per dozen*2=24dozens*2=48 dozens 240min/5min per dozen=48 dozens
240min/3min per dozen=80 dozens
So, Wash＆Mix has become a new bottleneck, The process’s new hourly capacity is the new bottleneck’s hourly capacity – 7.5 dozen per hour. they maximum output of the link is 40 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.
Therefore, an oven to rent cannot be more than 6.08$（15.2-9.12）.。