Assignment:
1. Consider the below flow line
The following table provides all the information need for designing Kanban control or SonwiR control on this line. All times are in minutes.
Machines (all data in minutes)
The daily demand is known to be 400 units per day. It is also known that the batch size for this line is 30 units per container. The line operates 24 hours each day without breaks.
a) Calculate the needed number of Kanban cards if each station will be controlled by Kanban. Use 10% safety factor.
b) If the entire line is to be controlled by Couwie system what should be the number of cards needed. For this, use 10% safety factor, and assume the card travel time from machine 6 to machine 1 is 12 minutes.
c) Which machine is the bottleneck machine on this line? Why?
2. Now assume that we will implement DBR technique to this line. I.e., the machines from Machine #1 to the bottleneck machine (inclusive) will be controlled conwip, Once the batch clears the bottleneck machine, it will travel the remaining machines in a push fashion without any delay (pull-push system). Calculate the number of cards needed on the conwip side of the line. Again, use 10% for safety factor and assume that the card transfer time from your bottleneck machine to machine #1 is 12 minutes.