Consider the following process, with a daily customer arrival rate of 560. Eaxh customer gos through a registration process in step 1.

There is a buffer before entering step 2, and the average duration of waiting in that buffer is 15 minutes.

At step 2, there is a assessment to specify where each customer must go next, and depending on the findings of that assessment, usually 70% of them are directed to step 3, which takes half an hour in average, while the rest of the customers are directed to step 4 which takes 45 minutes in average. Once each customer goes through the respective step (3 or 4), they exit this process. Please answer the following questions accordingly.

Note:

Consider each day as 8 hours.

Start and end points as well as decision points(assessment) have zero duration.

What is the flow unit in this process? (4 points)

How much is the flow time for the buffer? (4 points)

In average, 35 customers are waiting to be registered or are in the registation process (step 1). How long step 1 takes? (4 points)