Operations Management Homework Chapter 3
Homework 1 – GMGT 590
Q 3.5 | Step 1: Cut | Step 2: Put Grilled
Stuff on Bagel | Step 3:
Veggies on
Bagel | Step 4:
Cream
Cheese | Step 5:
Wrap | I | 1 | 1 | 1 | 1 | 1 | T | 3 min | 10 min | 5 min | 4 min | 2 min | R | 0.333333333 | 0.1 | 0.2 | 0.25 | 0.5 | % | 100% | 16.67% | 77.78% | 22.20% | 100% | ADJ R | 0.333333333 | .5999 | 0.2571 | 1.126 | 0.5 | | | | | | | Total Bagel | 180 | 100.00% | | | | Grilled Veggie | 30 | 16.67% | | | | Veggie Only | 110 | 61.10% | (+ incoming grilled = 77.78%) | Cream Cheese | 40 | 22.20% | | | | Wrap | 180 | 100.00% | | | |
A) Where in the process is the bottle neck? Step 3, Veggies on Bagel, is the bottleneck B) How many units can the process produce within 1 hours?
0.2571 units/minute x 60 minutes = 15.486 units or 15 units
Q 3.7
Part I | Step 1: Wash | Step 2: Wax | Step 3: Wheel Cleaning | Step 4: Inerior Cleaning | | I | 1 | 1 | 1 | 1 | | T | 10 | 10 | 7 | 20 | | R | 0.1 | 0.1 | 0.142857143 | 0.05 | | % | 100 | 0.6 | 0.45 | 0.3 | | ADJ R | 0.001 | 0.17 | 0.32 | 0.17 | | | | | | | | Type | Inclusive of | # of Customers per Package | % of Total | Customers per Step | % | Total Cust | | 40 | 100% | | | Package 1 | Step 1 | 16 | 40% | 40 | 100 | Package 2 | Step 1 and 2 | 6 | 15% | 24 | 0.6 | Package 3 | Step 1, 2 and 3 | 6 | 15% | 18 | 0.45 | Package 4 | Step 1, 2, 3 and 4 | 12 | 30% | 12 | 0.3 | | | | | | | Step | Thruput | Cycle | Idle Time | Utilization | | 1 | 0.25 | 10 | 10 | 0.333333333 | 33% | 2 | 0.67 | 10 | 10 | 0.333333333 | 33% | 3 | 0.95 | 7 | 13 | 0.212121212 | 21.20% | 4 | 0.17 | 20 | 0 | 1 | 100% |
A) What is the implied utilization of the employee doing the wheel cleaning service? 21.2% utilization B) Which resource has the highest implied utilization? Step 4, interior cleaning 100%
Part II | Step 1: Wash | Step 2: Wax | Step 3: Wheel Cleaning | Step 4: Inerior
Q 3.5 | Step 1: Cut | Step 2: Put Grilled
Stuff on Bagel | Step 3:
Veggies on
Bagel | Step 4:
Cream
Cheese | Step 5:
Wrap | I | 1 | 1 | 1 | 1 | 1 | T | 3 min | 10 min | 5 min | 4 min | 2 min | R | 0.333333333 | 0.1 | 0.2 | 0.25 | 0.5 | % | 100% | 16.67% | 77.78% | 22.20% | 100% | ADJ R | 0.333333333 | .5999 | 0.2571 | 1.126 | 0.5 | | | | | | | Total Bagel | 180 | 100.00% | | | | Grilled Veggie | 30 | 16.67% | | | | Veggie Only | 110 | 61.10% | (+ incoming grilled = 77.78%) | Cream Cheese | 40 | 22.20% | | | | Wrap | 180 | 100.00% | | | |
A) Where in the process is the bottle neck? Step 3, Veggies on Bagel, is the bottleneck B) How many units can the process produce within 1 hours?
0.2571 units/minute x 60 minutes = 15.486 units or 15 units
Q 3.7
Part I | Step 1: Wash | Step 2: Wax | Step 3: Wheel Cleaning | Step 4: Inerior Cleaning | | I | 1 | 1 | 1 | 1 | | T | 10 | 10 | 7 | 20 | | R | 0.1 | 0.1 | 0.142857143 | 0.05 | | % | 100 | 0.6 | 0.45 | 0.3 | | ADJ R | 0.001 | 0.17 | 0.32 | 0.17 | | | | | | | | Type | Inclusive of | # of Customers per Package | % of Total | Customers per Step | % | Total Cust | | 40 | 100% | | | Package 1 | Step 1 | 16 | 40% | 40 | 100 | Package 2 | Step 1 and 2 | 6 | 15% | 24 | 0.6 | Package 3 | Step 1, 2 and 3 | 6 | 15% | 18 | 0.45 | Package 4 | Step 1, 2, 3 and 4 | 12 | 30% | 12 | 0.3 | | | | | | | Step | Thruput | Cycle | Idle Time | Utilization | | 1 | 0.25 | 10 | 10 | 0.333333333 | 33% | 2 | 0.67 | 10 | 10 | 0.333333333 | 33% | 3 | 0.95 | 7 | 13 | 0.212121212 | 21.20% | 4 | 0.17 | 20 | 0 | 1 | 100% |
A) What is the implied utilization of the employee doing the wheel cleaning service? 21.2% utilization B) Which resource has the highest implied utilization? Step 4, interior cleaning 100%
Part II | Step 1: Wash | Step 2: Wax | Step 3: Wheel Cleaning | Step 4: Inerior