Carefully read the Note on Process Analysis by Ramdas & Parkhill. This is in your course-pack.

1. Show how all the Run Time and Capacity numbers in the process flow diagram in Figure 3 (page 7 of the note) were calculated. There are 6 Run Time numbers and 6 Capacity numbers. These calculations are explained in the note. table showing all details. (24 pts)
2. What is the daily capacity (in terms of number of customers served) of the dry-cleaning process as a whole? Assume each day is 12 hours long. (5 pts)
3. Suppose capacity at Pressing is doubled by adding 2 persons and 2 pressing machines. What is the new daily capacity (number of customers served) of the dry-cleaning process as a whole? (6 pts)
4. Customers have been complaining that stains are not removed properly. So the laundry reduces the batch size in pre-treatment to 75 items. Pre-treatment still takes 90 minutes plus 5 minutes for solvent tank change. Now what is the hourly capacity of pre-treatment?How does this impact the overall capacity of the process? (6 pts)
5. How much does the hourly capacity of the dry-cleaning machine change if the batch size is increased to 120 items from 90 items? (5 pts)
6. How much does the hourly capacity of the dry-cleaning machine change if tanks are switched only every 5 runs? (6 pts)
7. Suppose 200 customers drop off laundry over a typical 12-hour day. What is the utilization of each of the different stages of the dry-cleaning process? Show in the form of a table. Will there be a problem? Do not consider the changes suggested in questions 3-6. (24 pts)
8. If the average number of clothes per customer increases from 3 to 4, which stages would be most impacted by this? Assume 180 customers per 12-hr day as stated in the case. Answer by calculating the utilization at each stage. Is the current system capable of dealing with this increase? (24 pts)

	Placing Order	Pre-Treatment	Dry Cleaning	Pressing	Packing	Pick up & Payment
Run Time	1 min per item or 3 mins per order	60 mins/56.8 items per hour = 1.06 mins per item	60 mins/90 items per hour = 0.67 min per item	Each presser can press an item in 2.5 mins. 24 items per hour	0.5 mins per item or 2 items per min	1 min per item
Capacity	1 item per minute or 60 items per hour	90 items in 90 mins with 5 mins setup (90/95 mins) x 60 mins/hour = 56.8 items per hour	0.67 x 60 mins = 90 items per hour. It can be increased if consecutive loads are the same color	60 mins / 2.5 minutes per item = 24 x 2 = 48 items per hour between the two pressers	2 items per min x 60 mins = 120 per hour	1 min per item x 60 mins = 60 items per hour