Essay About 4Hrs And Total Activity Time

Kristen Cookies Company
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Case Analysis: Kristens Cookies Company
Preliminary Analysis:
Inputs:
Cookie Order
Outputs:
One dozen cookies
Sequence of tasks:
1) Washing & Mixing
2) Spooning
3) Placing in Oven / Setting Timer
4) Baking
5) Cooling
6) Packing Cookies in Boxes
7) Processing Payment(s)
The ability to produce a rush order, in a worker pace line, depends on whether or not we
have cookies in inventory. If we dont have any cookies in inventory then it would take
26 minutes to produce the first dozen and an additional 10 minutes per order to complete
each additional dozen.
2) How long does it take to produce an order dozen cookies? How many orders can be
filled in a 4 hour night?
* Washing & Mixing = 6 minutes (dozen)
* Spooning = 2 minutes (per tray)
* Placing in Oven / Setting Timer = 1 minute
* Baking = 9 minutes
* Cooling = 5 minutes (activity 2)
* Packing in Box = 2 minutes (activity 2)
* Payment = 1 minute (activity 3)
Total Activity Time: 26 minutes (one dozen, “worker paced line”)
Kristen is responsible for 8 minutes of production related to activity 1= capacity of .
125 batches/minutes x 60 minutes=7.5 dozens/hour
Roommate is responsible for 18 minutes of production related to activities 2 and
3=.55556 batches/minute x 60 minutes – 3.33 dozens/hour
Process Capacity = Capacity of the bottle neck = 1/10 min (10 min includes set the timer
and oven)= .10
Flow rate = Process Capacity = 1/10 min (This number includes time in oven)=.10
Time to finish X batches = Time through an empty process + (X-1)/Flow rate
If total time = 4hr, then
4hrs = 4hrs*60 min/hr = 26 min + (X-1) /(1/10 min)
 240 min = 26 min + (X-1)*10min
 (X-1)*10min = 240min – 26min = 214/10
 X-1 = 21.40
 X = 22.40 orders for one dozen cookies
Therefore, in 4 hrs, Kristen can fulfill 22 orders of 1 dozen cookies
2) How much of your own and your rommates valuable time will it take to fill each order?
Kristen is responsible for 8 minutes of production related to activity 1= capacity of .125
batches/minutes x 60 minutes=7.5 dozens/hour
Roommate is responsible for 18 minutes of production related to activities 2 and
3=.55556 batches/minute x 60 minutes =3.33 dozens/hour
3) What is the labor content in an order of one dozen cookies? How much should Kristen
charge for such an order?
Washing & Mixing (Kristen) = 6 minutes (dozen)
Spooning (Kristen) = 2 minutes (per tray)
Placing in Oven / Setting Timer (Roomie) = 1 minute
Packing in Box (Roomie) = 2 minutes
Payment (Roomie) = 1 minute
Labor Content = Sum of Activity Times With Labor
= 6 mins/dozen + 2 mins/dozen + 1 min/dozen + 2 mins/dozen + 1 mins/dozen
= 12 mins / dozen
*Assumption that washing and mixing requires operator presences/intervention.
Since the value of Kristens time, nor the hourly cost of her roommates time, was given
in the article provided, we can only guess at how much Kristen should ultimately charge