Kristen’s cookie company

1. How long will it take you to fill a rush order? The first production step is done by myself and consists to wash out the mixing bowl, prepare all of the ingredients and mix them in my food processors. I’m able to prepare ingredients for three dozen in this step, but it takes always six minutes if I cook one or three dozens. Secondly, I must dish up the cookies onto a tray, and this takes two minutes. As I can’t prepare several trays in the same time, it takes me two minutes per tray. Then, the next step is done by my roommate. He puts the cookies into the oven and sets the thermostat at timer, the whole takes a one little minute. Then, the cookies cook alone in the oven for nine minutes. After these nine minutes, the roommate removes the cookies from the oven and they cool outside for five minutes. When they are cool, the roommate takes two minutes to pack them in a box. Finally, for the last minute he accepts the payment and gives the cookies to the customer.

To conclude, in adding every steps of the process production we can see that the Theoretical Flow Time is twenty-six minutes long.

2. How many orders can you fill in a night, assuming you are open fours hours each night?

First we can see with this table the resource capacity of our resources. The oven has the weakest capacity (6 dozen per hour at full utilization). Therefore, the oven is the bottleneck of the process which means that the oven’s capacity represents as well the capacity of the whole process. Indeed, the entire process is done according to the oven.

For example, when the washing and the mixing have been prepared, we must still wait that the oven is free. We represent that with a buffer time two minutes long. Finally, after a short observation we get to the conclusion that the cycle time is ten minutes long. We finish the first dozen and ten minutes late the second.

To answer the question, we found this equation 26