WGU C215 Operations Management - Western Governors
University - Academic Year 2026/2027 - Objective Assessment
Comprehensive Examination with 100 Verified Questions and
Correct Answer Rationales
About This Exam Bank
This comprehensive 140-question exam bank is designed to prepare candidates for WGU C215 Operations
Management - Western Governors University - Academic Year 2026/2027 - Objective Assessment Comprehensive
Examination with 100 Verified Questions and Correct Answer Rationales. Every question is aligned with the latest
official content outline and includes a detailed, evidence-based rationale, an explanation of why each remaining
option is incorrect, and a supporting reference.
Keywords
WGU C215 Operations Management - Western Governors University - Academic Year 2026/2027 - Objective
Assessment Comprehensive Examination with 100 Verified Questions and Correct Answer Rationales, exam bank,
practice questions, verified answers, detailed rationales, test prep, study guide, review questions, certification exam,
latest update, WGU C215 Operations Management - Western Governors University - Academic Year 2026/2027 -
Objective Assessment Comprehensive Examination with 100 Verified Questions and Correct Answer Rationales,
exam bank, practice questions, verified answers, detailed rationales
PART 1: APPLY OPERATIONS STRATEGY CONCEPTS TO ALIGN PRODUCTION AND
SERVICE PROCESSES WITH ORGANIZATIONAL GOALS
1. A firm's operations strategy emphasizes mass customization. Which competitive priority is most directly
supported by this strategy?
A) Low-cost operations
B) Delivery speed
C) Flexibility and variety
D) Consistent quality
' Correct Answer: C
Rationale: Mass customization aims to provide customized products at near-mass production costs, requiring high
flexibility and variety to meet diverse customer needs. Low-cost operations (A) is a trade-off, delivery speed (B) is
not the primary focus, and consistent quality (D) is important but not the defining priority.
2. In a process with a bottleneck at Station 3, which action would most effectively increase overall throughput?
A) Increase capacity at Station 1
B) Reduce processing time at Station 3
C) Add a buffer inventory before Station 2
D) Implement a pull system at Station 4
' Correct Answer: B
Rationale: The bottleneck determines the process capacity; reducing its processing time directly increases
throughput. Increasing capacity at non-bottleneck stations (A) or adding buffers (C) does not increase throughput,
and a pull system (D) may not address the bottleneck.
Page 1
,3. A hospital's emergency department wants to reduce patient waiting time. Which quality tool is most appropriate
for identifying the root causes of delays?
A) Control chart
B) Pareto chart
C) Fishbone diagram
D) Scatter diagram
' Correct Answer: C
Rationale: A fishbone diagram (cause-and-effect) helps identify potential root causes of a problem. Control charts
(A) monitor process stability, Pareto charts (B) prioritize problems, and scatter diagrams (D) show correlations but
do not identify root causes.
4. A company uses a fixed-order quantity inventory model. If demand increases and all other parameters remain
constant, what happens to the economic order quantity (EOQ)?
A) It increases.
B) It decreases.
C) It remains unchanged.
D) It becomes zero.
' Correct Answer: A
Rationale: EOQ is proportional to the square root of demand. An increase in demand leads to a higher EOQ. The
other options are incorrect because they do not reflect the direct relationship between demand and EOQ.
5. Which scheduling rule minimizes the average flow time in a single-machine job shop?
A) First-come, first-served (FCFS)
B) Shortest processing time (SPT)
C) Earliest due date (EDD)
D) Critical ratio (CR)
' Correct Answer: B
Rationale: SPT minimizes average flow time and average waiting time. FCFS (A) is fair but not optimal, EDD (C)
minimizes maximum lateness, and CR (D) is used for dynamic scheduling.
6. In a supply chain, the bullwhip effect can be mitigated by:
A) Increasing order batching
B) Sharing point-of-sale data
C) Using multiple suppliers
D) Offering quantity discounts
' Correct Answer: B
Rationale: Sharing POS data reduces information distortion, a key cause of the bullwhip effect. Increasing batching
(A) and quantity discounts (D) exacerbate it, while multiple suppliers (C) may increase complexity.
7. A project has an expected duration of 20 weeks and a standard deviation of 2 weeks. What is the probability of
completing the project within 23 weeks? (Assume normal distribution.)
A) 0.9332
B) 0.8413
C) 0.9772
D) 0.9987
' Correct Answer: A
Rationale: Z = (23-20)/2 = 1.5. From standard normal table, P(Z<1.5) = 0.9332. Other options correspond to
different Z-values.
Page 2
,8. Which lean tool is used to signal the need for replenishment in a pull system?
A) Kanban
B) Andon
C) Poka-yoke
D) Kaizen
' Correct Answer: A
Rationale: Kanban is a card or signal that authorizes production or withdrawal of materials. Andon (B) signals
problems, poka-yoke (C) is error-proofing, and kaizen (D) is continuous improvement.
9. A moving average forecast with n=3 is used. If actual demand for the last three periods was 100, 110, and 120,
what is the forecast for the next period?
A) 100
B) 110
C) 120
D) 130
' Correct Answer: B
Rationale: The 3-period moving average is (100+110+120)/3 = 110. Other options are individual values or
incorrect calculations.
10. In a queuing system with Poisson arrivals and exponential service times, which model assumes a single server
and infinite queue capacity?
A) M/M/1
B) M/M/s
C) M/G/1
D) M/D/1
' Correct Answer: A
Rationale: M/M/1 denotes Poisson arrivals, exponential service, one server, and infinite capacity. M/M/s (B) has
multiple servers, M/G/1 (C) general service, and M/D/1 (D) deterministic service.
11. A firm's process has a value-added time of 4 minutes and a total lead time of 36 minutes. If the firm reduces
non-value-added time by 50% while value-added time stays constant, what is the new process cycle efficiency
(PCE)?
A) 20%
B) 11.1%
C) 22.2%
D) 10%
' Correct Answer: A
Rationale: Original PCE = 4/36 = 11.1%. Non-value-added time = 32 min; halving it gives 16 min, so new lead
time = 4 + 16 = 20 min. New PCE = 4/20 = 20%. B is the original PCE; C results from halving total lead time; D is
arbitrary.
12. A company uses a fixed-order-quantity model. Annual demand is 10,000 units, ordering cost is $50 per order,
and holding cost is $4 per unit per year. If the supplier offers a 5% price discount for orders of 2,000 units or more,
and the unit price is $20, what is the total annual cost (ordering + holding + purchasing) for the optimal order
quantity under the discount?
A) $194,250
B) $202,000
C) $200,500
Page 3
, D) $196,000
' Correct Answer: A
Rationale: EOQ without discount = sqrt(2*10000*50/4) = 500 units, total cost = (10000/500)*50 + (500/2)*4 +
10000*20 = 1000 + 1000 + 200000 = $202,000. With discount, unit price = $19, Q must be at least 2000. At
Q=2000, ordering cost = (10000/2000)*50 = 250, holding cost = (2000/2)*4 = 4000, purchasing = 10000*19 =
190,000. Total = $194,250. This is lower than $202,000, so optimal is to order 2000. B is the total cost without
discount; C and D are distractors.
13. In a just-in-time (JIT) system, which of the following best explains why reducing setup time is critical to
achieving small lot sizes and smooth production flow?
A) It directly reduces the economic order quantity (EOQ) by lowering ordering costs.
B) It allows the use of a pull system by decreasing the need for safety stock.
C) It increases the capacity utilization of bottleneck operations.
D) It enables more frequent changeovers without sacrificing throughput, thereby reducing lot sizes and
work-in-process inventory.
' Correct Answer: D
Rationale: In JIT, reducing setup time is essential because it allows more frequent changeovers, which enables
smaller lot sizes and reduces WIP inventory, aligning with the goal of smooth flow. Option A is incorrect because
EOQ is not the focus of JIT; JIT aims to reduce lot sizes regardless of EOQ. Option B is a consequence, not the
primary reason. Option C is not directly related to setup time reduction; it may increase but is not the core rationale.
D correctly captures the direct relationship between setup time reduction and small lot sizes.
14. A company is evaluating a new product with the following cash flows: initial investment $100,000; annual net
cash inflows $30,000 for 5 years. The company's required rate of return is 10%. What is the net present value (NPV)
of this project? (PV factor for annuity, 5 years, 10% = 3.791)
A) $13,730
B) $50,000
C) $15,000
D) $-13,730
' Correct Answer: A
Rationale: NPV = PV of inflows - initial investment = $30,000 * 3.791 - $100,000 = $113,730 - $100,000 =
$13,730. Option A is correct. B is the total undiscounted inflows minus investment ($150,000 - $100,000 =
$50,000). C is incorrect. D is the negative of the correct NPV, which would occur if the discount rate were higher or
inflows lower.
15. Which of the following is the most significant advantage of using a level production strategy in aggregate
planning compared to a chase strategy?
A) It minimizes inventory holding costs.
B) It avoids the costs of changing workforce levels and overtime.
C) It ensures that production exactly matches demand each period.
D) It reduces the need for accurate demand forecasting.
' Correct Answer: B
Rationale: A level production strategy maintains a constant workforce and production rate, avoiding the costs
associated with hiring, layoffs, and overtime that are inherent in a chase strategy. Option A is incorrect because level
production typically increases inventory holding costs. Option C is characteristic of a chase strategy, not level.
Option D is false; accurate forecasting is still important for both strategies.
Page 4
University - Academic Year 2026/2027 - Objective Assessment
Comprehensive Examination with 100 Verified Questions and
Correct Answer Rationales
About This Exam Bank
This comprehensive 140-question exam bank is designed to prepare candidates for WGU C215 Operations
Management - Western Governors University - Academic Year 2026/2027 - Objective Assessment Comprehensive
Examination with 100 Verified Questions and Correct Answer Rationales. Every question is aligned with the latest
official content outline and includes a detailed, evidence-based rationale, an explanation of why each remaining
option is incorrect, and a supporting reference.
Keywords
WGU C215 Operations Management - Western Governors University - Academic Year 2026/2027 - Objective
Assessment Comprehensive Examination with 100 Verified Questions and Correct Answer Rationales, exam bank,
practice questions, verified answers, detailed rationales, test prep, study guide, review questions, certification exam,
latest update, WGU C215 Operations Management - Western Governors University - Academic Year 2026/2027 -
Objective Assessment Comprehensive Examination with 100 Verified Questions and Correct Answer Rationales,
exam bank, practice questions, verified answers, detailed rationales
PART 1: APPLY OPERATIONS STRATEGY CONCEPTS TO ALIGN PRODUCTION AND
SERVICE PROCESSES WITH ORGANIZATIONAL GOALS
1. A firm's operations strategy emphasizes mass customization. Which competitive priority is most directly
supported by this strategy?
A) Low-cost operations
B) Delivery speed
C) Flexibility and variety
D) Consistent quality
' Correct Answer: C
Rationale: Mass customization aims to provide customized products at near-mass production costs, requiring high
flexibility and variety to meet diverse customer needs. Low-cost operations (A) is a trade-off, delivery speed (B) is
not the primary focus, and consistent quality (D) is important but not the defining priority.
2. In a process with a bottleneck at Station 3, which action would most effectively increase overall throughput?
A) Increase capacity at Station 1
B) Reduce processing time at Station 3
C) Add a buffer inventory before Station 2
D) Implement a pull system at Station 4
' Correct Answer: B
Rationale: The bottleneck determines the process capacity; reducing its processing time directly increases
throughput. Increasing capacity at non-bottleneck stations (A) or adding buffers (C) does not increase throughput,
and a pull system (D) may not address the bottleneck.
Page 1
,3. A hospital's emergency department wants to reduce patient waiting time. Which quality tool is most appropriate
for identifying the root causes of delays?
A) Control chart
B) Pareto chart
C) Fishbone diagram
D) Scatter diagram
' Correct Answer: C
Rationale: A fishbone diagram (cause-and-effect) helps identify potential root causes of a problem. Control charts
(A) monitor process stability, Pareto charts (B) prioritize problems, and scatter diagrams (D) show correlations but
do not identify root causes.
4. A company uses a fixed-order quantity inventory model. If demand increases and all other parameters remain
constant, what happens to the economic order quantity (EOQ)?
A) It increases.
B) It decreases.
C) It remains unchanged.
D) It becomes zero.
' Correct Answer: A
Rationale: EOQ is proportional to the square root of demand. An increase in demand leads to a higher EOQ. The
other options are incorrect because they do not reflect the direct relationship between demand and EOQ.
5. Which scheduling rule minimizes the average flow time in a single-machine job shop?
A) First-come, first-served (FCFS)
B) Shortest processing time (SPT)
C) Earliest due date (EDD)
D) Critical ratio (CR)
' Correct Answer: B
Rationale: SPT minimizes average flow time and average waiting time. FCFS (A) is fair but not optimal, EDD (C)
minimizes maximum lateness, and CR (D) is used for dynamic scheduling.
6. In a supply chain, the bullwhip effect can be mitigated by:
A) Increasing order batching
B) Sharing point-of-sale data
C) Using multiple suppliers
D) Offering quantity discounts
' Correct Answer: B
Rationale: Sharing POS data reduces information distortion, a key cause of the bullwhip effect. Increasing batching
(A) and quantity discounts (D) exacerbate it, while multiple suppliers (C) may increase complexity.
7. A project has an expected duration of 20 weeks and a standard deviation of 2 weeks. What is the probability of
completing the project within 23 weeks? (Assume normal distribution.)
A) 0.9332
B) 0.8413
C) 0.9772
D) 0.9987
' Correct Answer: A
Rationale: Z = (23-20)/2 = 1.5. From standard normal table, P(Z<1.5) = 0.9332. Other options correspond to
different Z-values.
Page 2
,8. Which lean tool is used to signal the need for replenishment in a pull system?
A) Kanban
B) Andon
C) Poka-yoke
D) Kaizen
' Correct Answer: A
Rationale: Kanban is a card or signal that authorizes production or withdrawal of materials. Andon (B) signals
problems, poka-yoke (C) is error-proofing, and kaizen (D) is continuous improvement.
9. A moving average forecast with n=3 is used. If actual demand for the last three periods was 100, 110, and 120,
what is the forecast for the next period?
A) 100
B) 110
C) 120
D) 130
' Correct Answer: B
Rationale: The 3-period moving average is (100+110+120)/3 = 110. Other options are individual values or
incorrect calculations.
10. In a queuing system with Poisson arrivals and exponential service times, which model assumes a single server
and infinite queue capacity?
A) M/M/1
B) M/M/s
C) M/G/1
D) M/D/1
' Correct Answer: A
Rationale: M/M/1 denotes Poisson arrivals, exponential service, one server, and infinite capacity. M/M/s (B) has
multiple servers, M/G/1 (C) general service, and M/D/1 (D) deterministic service.
11. A firm's process has a value-added time of 4 minutes and a total lead time of 36 minutes. If the firm reduces
non-value-added time by 50% while value-added time stays constant, what is the new process cycle efficiency
(PCE)?
A) 20%
B) 11.1%
C) 22.2%
D) 10%
' Correct Answer: A
Rationale: Original PCE = 4/36 = 11.1%. Non-value-added time = 32 min; halving it gives 16 min, so new lead
time = 4 + 16 = 20 min. New PCE = 4/20 = 20%. B is the original PCE; C results from halving total lead time; D is
arbitrary.
12. A company uses a fixed-order-quantity model. Annual demand is 10,000 units, ordering cost is $50 per order,
and holding cost is $4 per unit per year. If the supplier offers a 5% price discount for orders of 2,000 units or more,
and the unit price is $20, what is the total annual cost (ordering + holding + purchasing) for the optimal order
quantity under the discount?
A) $194,250
B) $202,000
C) $200,500
Page 3
, D) $196,000
' Correct Answer: A
Rationale: EOQ without discount = sqrt(2*10000*50/4) = 500 units, total cost = (10000/500)*50 + (500/2)*4 +
10000*20 = 1000 + 1000 + 200000 = $202,000. With discount, unit price = $19, Q must be at least 2000. At
Q=2000, ordering cost = (10000/2000)*50 = 250, holding cost = (2000/2)*4 = 4000, purchasing = 10000*19 =
190,000. Total = $194,250. This is lower than $202,000, so optimal is to order 2000. B is the total cost without
discount; C and D are distractors.
13. In a just-in-time (JIT) system, which of the following best explains why reducing setup time is critical to
achieving small lot sizes and smooth production flow?
A) It directly reduces the economic order quantity (EOQ) by lowering ordering costs.
B) It allows the use of a pull system by decreasing the need for safety stock.
C) It increases the capacity utilization of bottleneck operations.
D) It enables more frequent changeovers without sacrificing throughput, thereby reducing lot sizes and
work-in-process inventory.
' Correct Answer: D
Rationale: In JIT, reducing setup time is essential because it allows more frequent changeovers, which enables
smaller lot sizes and reduces WIP inventory, aligning with the goal of smooth flow. Option A is incorrect because
EOQ is not the focus of JIT; JIT aims to reduce lot sizes regardless of EOQ. Option B is a consequence, not the
primary reason. Option C is not directly related to setup time reduction; it may increase but is not the core rationale.
D correctly captures the direct relationship between setup time reduction and small lot sizes.
14. A company is evaluating a new product with the following cash flows: initial investment $100,000; annual net
cash inflows $30,000 for 5 years. The company's required rate of return is 10%. What is the net present value (NPV)
of this project? (PV factor for annuity, 5 years, 10% = 3.791)
A) $13,730
B) $50,000
C) $15,000
D) $-13,730
' Correct Answer: A
Rationale: NPV = PV of inflows - initial investment = $30,000 * 3.791 - $100,000 = $113,730 - $100,000 =
$13,730. Option A is correct. B is the total undiscounted inflows minus investment ($150,000 - $100,000 =
$50,000). C is incorrect. D is the negative of the correct NPV, which would occur if the discount rate were higher or
inflows lower.
15. Which of the following is the most significant advantage of using a level production strategy in aggregate
planning compared to a chase strategy?
A) It minimizes inventory holding costs.
B) It avoids the costs of changing workforce levels and overtime.
C) It ensures that production exactly matches demand each period.
D) It reduces the need for accurate demand forecasting.
' Correct Answer: B
Rationale: A level production strategy maintains a constant workforce and production rate, avoiding the costs
associated with hiring, layoffs, and overtime that are inherent in a chase strategy. Option A is incorrect because level
production typically increases inventory holding costs. Option C is characteristic of a chase strategy, not level.
Option D is false; accurate forecasting is still important for both strategies.
Page 4
