Kristen's Cookies Company
Process Flow Diagram
Case Questions
1. How long will it take you to fill a rush order?
Time taken to fill a rush order = MLT = 6 + 2 + 10 + 5 + 2 + 1 = 26 minutes
2. How many orders can you fill in a night, assuming you are open four hours each night?
4 hours per each night = 4 hours * 60 minutes = 240 minutes
Cycle Time = The Duration of the bottleneck = (Setting thermostat and Timer) + (Baking Cookies) = 1 minute + 9 minute = 10 minutes
Maximum no of orders we can fill in a night = (No of minutes per night-Duration of First Setup) / Cycle Time + 1 = ((240 – 26) / 10) + 1 = 22.4 orders ~ 22 orders
Explanation: This is because the first order takes 26 minutes for the first batch of cookies to finish and each subsequent batch takes 10 minutes because it has reached steady state. Thus, we take 4 hours worth of time, minus off 26 minutes for the first batch and then divide by ten to get the number of orders.
3. How much of your own and your roommate’s valuable time will it take to fill each order?
Own Time:
• Mixing Ingredients 6 minutes
• Dishing out cookies onto tray 2 minutes
• Total Time 8 minutes
Roommate’s Time:
• Setting thermostat and timer 1 minutes
• Packing the cookies 2 minutes
• Collecting payment 1 minutes
• Total Time 4 minutes
Explanation: Our group defines valuable time as time that can be used to do other kinds of productive work. Hence, processes carried out by me, mixing the ingredients and dishing the cookies onto the tray, takes up 8 minutes of my valuable time. This is because I have to be physically present and be doing “work”. However, only 4 minutes of my roommate’s valuable time is used because the 9 minutes (baking of cookies) and 5 minutes (cooling the cookies) can be used to do other more productive work.
4. Because your baking trays can hold exactly one dozen cookies, you will produce and sell cookies by the dozen. Should
Case Questions
1. How long will it take you to fill a rush order?
Time taken to fill a rush order = MLT = 6 + 2 + 10 + 5 + 2 + 1 = 26 minutes
2. How many orders can you fill in a night, assuming you are open four hours each night?
4 hours per each night = 4 hours * 60 minutes = 240 minutes
Cycle Time = The Duration of the bottleneck = (Setting thermostat and Timer) + (Baking Cookies) = 1 minute + 9 minute = 10 minutes
Maximum no of orders we can fill in a night = (No of minutes per night-Duration of First Setup) / Cycle Time + 1 = ((240 – 26) / 10) + 1 = 22.4 orders ~ 22 orders
Explanation: This is because the first order takes 26 minutes for the first batch of cookies to finish and each subsequent batch takes 10 minutes because it has reached steady state. Thus, we take 4 hours worth of time, minus off 26 minutes for the first batch and then divide by ten to get the number of orders.
3. How much of your own and your roommate’s valuable time will it take to fill each order?
Own Time:
• Mixing Ingredients 6 minutes
• Dishing out cookies onto tray 2 minutes
• Total Time 8 minutes
Roommate’s Time:
• Setting thermostat and timer 1 minutes
• Packing the cookies 2 minutes
• Collecting payment 1 minutes
• Total Time 4 minutes
Explanation: Our group defines valuable time as time that can be used to do other kinds of productive work. Hence, processes carried out by me, mixing the ingredients and dishing the cookies onto the tray, takes up 8 minutes of my valuable time. This is because I have to be physically present and be doing “work”. However, only 4 minutes of my roommate’s valuable time is used because the 9 minutes (baking of cookies) and 5 minutes (cooling the cookies) can be used to do other more productive work.
4. Because your baking trays can hold exactly one dozen cookies, you will produce and sell cookies by the dozen. Should