If the factory uses a safety factor of 10%, how many kanbans are needed for the circuit board… 1 answer below »

An assembly station is asked to process 100 circuit boards per hour. It takes 20 minutes to receive the necessary components from the previous workstation. Completed circuit boards are placed in a rack that will hold 10 boards. The rack must be full before it is sent on to the next workstation. If the factory uses a safety factor of 10%, how many kanbans are needed for the circuit board assembly process?