Floral Shop

1
Floral Shop

• A floral shop has two employees, the florist and
  a clerk. When a phone order comes in, the clerk
  spends 3 minutes taking the order, passes it off
  to the florist, and then spends 5 minutes
  verifying the credit card while the floral
  arrangement is made. The florist spends 3
  minutes cutting, then 9 minutes arranging the
  flowers.
• Draw the flow diagram
• What is the critical path of filling an order?
• How long does an order take?

2
Floral Shop
Clerk in white, florist in blue
3 mins
9 mins
Cut flowers
Arrange flowers
Take order
Credit card
3 mins
5 mins
3
Problem 1 Floral Shop
3 mins
9 mins
Cut flowers
Arrange flowers
Take order
Credit card
3 mins
5 mins
Critical path order?cut?arrange
Order time 339 15 minutes
capacity 1 order/15 minutes 4 orders/hour
4
Problem 1 Floral Shop
3 mins
9 mins
Cut flowers
Arrange flowers
Take order
Credit card
3 mins
5 mins
Critical path order?cut?arrange
capacity 1 order/15 minutes 4 orders/hour
How might we speed up floral orders?
5
Problem 1 Floral Shop
3 mins
9 mins
Cut flowers
Arrange flowers
Take order
Credit card
3 mins
Assist in arranging
5 mins
helpTime
If Clerk helps in arrangements (helpTime
minutes) florist time 3 (9
helpTime) clerk 5 helpTime
Optimal utilization is when both spend equal
time 3 9 - helpTime 5 helpTime ? 12 - HT
5 HT Or helpTime 3.5 minutes
6
Problem 1 Floral Shop
3 mins
5.5 mins
Cut flowers
Arrange flowers
Take order
Credit card
3 mins
Assist in arranging
5 mins
3.5 mins
capacity 1 order/11.5 mins 5.21 orders/hour
7
Problem 1 Floral Shop
Cut flowers
Arrange flowers
Arrange previous
Cut previous
Assist in previous
Take order
Credit card
Assist in arranging
Optimal solution Permit overlap and fully share
tasks Total task time 3 (order) 3(cut)
9(arrange) 5 (credit)
20 minutes Total ? 10 mins between 2
people Capacity 1 order/10 mins 6 orders/hour
8
Problem 1 Floral Shop
50 increase
9
Team Project

• After HTM302 today, Meredith must
• meet with her team, Bill and Mary, in the Library
  for 1 hour
• then write her section of a report (1 hour)
• while she is writing her section, Bills section
  is being written (2 hours)
• after both sections are completed, Mary must
  assemble and finalize the report (1 hour)
• then Mary must email report to the instructor (5
  minutes)
• Draw the network diagram and find the critical
  path

10
Team Project

• Critical path Meet ? Bill writes ? Mary
  assembles ? Mary emails
• Path length 4 hours 5 minutes