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,WGU D027 Final Exam 2026
2026/2027 Examination
Total Questions: 200
Instructions:
• Answer all questions.
• Select the single best answer.
• Each question has four answer choices: A, B, C, and D.
• Select only ONE answer for each question.
SECTION 1: Quality Improvement, Patient Safety, and Root Cause Analysis (Q1–Q25)
Q1. A hospital quality committee is reviewing a sentinel event involving a medication overdose
that resulted in patient harm. Which tool is most appropriate for identifying the underlying system
failures that contributed to this event?
A. Pareto chart
B. Root Cause Analysis (RCA)
C. Run chart
D. Force field analysis
Correct Answer: B. Root Cause Analysis (RCA)
Rationale: Root Cause Analysis is specifically designed to investigate sentinel events and adverse
outcomes by systematically identifying underlying system-level factors rather than blaming
individuals. Pareto charts identify the "vital few" contributors to a problem but do not explore
causation. Run charts track data over time, and force field analysis examines driving and restraining
forces for change.
Q2. A nurse manager notices that medication administration errors have varied significantly over
the past 12 months, with some months showing improvement and others showing worsening.
Which quality tool would best display this pattern over time?
A. Fishbone diagram
B. Histogram
C. Control chart
D. Scatter diagram
Correct Answer: C. Control chart
Rationale: Control charts are specifically designed to track process performance over time and
distinguish between common cause variation (normal fluctuations) and special cause variation
(unexpected patterns). Fishbone diagrams identify potential causes, histograms show frequency
distributions, and scatter diagrams examine relationships between two variables.
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, Q3. During a quality improvement initiative to reduce hospital-acquired pressure injuries, the
team has identified the problem, analyzed contributing factors, and selected an intervention.
According to the PDSA cycle, what is the next step?
A. Act
B. Study
C. Plan
D. Do
Correct Answer: D. Do
Rationale: The PDSA cycle follows a logical sequence: Plan (identify problem and design change),
Do (implement the change on a small scale), Study (analyze results), and Act (standardize or modify).
After selecting an intervention, the team must implement or "Do" the change before studying its
effects.
Q4. A hospital administrator sets a quality goal: "Reduce central line-associated bloodstream
infections by 30% within the next 9 months." Which SMART criterion is most clearly demonstrated
by the phrase "within the next 9 months"?
A. Specific
B. Measurable
C. Time-bound
D. Achievable
Correct Answer: C. Time-bound
Rationale: The SMART framework requires goals to be Specific, Measurable, Achievable,
Relevant, and Time-bound. The phrase "within the next 9 months" establishes a clear deadline,
satisfying the time-bound criterion. The percentage reduction addresses measurability, and the
specific infection type addresses specificity.
Q5. A nurse reports a near-miss medication error where the wrong dose was prepared but
caught before administration. What should the nurse manager do first?
A. Conduct a safety huddle to discuss the event and identify system improvements
B. File a disciplinary report against the nurse who prepared the medication
C. Document the event and take no further action since no harm occurred
D. Ask the nurse to keep the event confidential to avoid alarming other staff
Correct Answer: A. Conduct a safety huddle to discuss the event and identify system
improvements
Rationale: Near-miss reporting is a critical component of a culture of safety. The first step should
be to learn from the event through discussion and system analysis. Punitive responses discourage
reporting, and ignoring near-misses forfeits valuable learning opportunities. Safety huddles allow
immediate discussion and identification of system improvements.
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, Q6. A quality improvement team is investigating why patients on a medical-surgical unit are
experiencing frequent falls. The team creates a diagram that categorizes potential causes into
people, environment, equipment, and processes. Which tool are they using?
A. Flowchart
B. Run chart
C. Fishbone (Ishikawa) diagram
D. Check sheet
Correct Answer: C. Fishbone (Ishikawa) diagram
Rationale: The fishbone diagram, also called an Ishikawa or cause-and-effect diagram, organizes
potential causes of a problem into categories. This visual tool helps teams systematically explore
contributing factors. Flowcharts display process steps, run charts track data over time, and check
sheets collect frequency data.
Q7. Which action best demonstrates a high-reliability organization's approach to patient safety?
A. Disciplining staff who report errors to maintain accountability
B. Encouraging staff at all levels to speak up about safety concerns
C. Assuming that established processes are inherently safe
D. Downplaying near-misses to maintain staff morale
Correct Answer: B. Encouraging staff at all levels to speak up about safety concerns
Rationale: High-reliability organizations cultivate a culture where all staff feel empowered to
identify and report safety concerns. They recognize that errors are opportunities for learning, not
punishment. Assuming processes are safe leads to complacency, and downplaying near-misses
prevents identification of system weaknesses.
Q8. A quality improvement team wants to identify which categories of medication errors occur
most frequently so they can prioritize improvement efforts. Which tool would be most useful for this
purpose?
A. Control chart
B. Pareto chart
C. Scatter diagram
D. Affinity diagram
Correct Answer: B. Pareto chart
Rationale: A Pareto chart combines a bar graph and a line graph to display the frequency of
different categories of a problem in descending order. This helps teams identify the "vital few"
categories that account for the majority of problems, enabling prioritization of improvement efforts.
Q9. A nurse manager observes that hand hygiene compliance rates have been steadily declining
over the past three months. This observation represents what type of measure?
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,WGU D027 Final Exam 2026
2026/2027 Examination
Total Questions: 200
Instructions:
• Answer all questions.
• Select the single best answer.
• Each question has four answer choices: A, B, C, and D.
• Select only ONE answer for each question.
SECTION 1: Quality Improvement, Patient Safety, and Root Cause Analysis (Q1–Q25)
Q1. A hospital quality committee is reviewing a sentinel event involving a medication overdose
that resulted in patient harm. Which tool is most appropriate for identifying the underlying system
failures that contributed to this event?
A. Pareto chart
B. Root Cause Analysis (RCA)
C. Run chart
D. Force field analysis
Correct Answer: B. Root Cause Analysis (RCA)
Rationale: Root Cause Analysis is specifically designed to investigate sentinel events and adverse
outcomes by systematically identifying underlying system-level factors rather than blaming
individuals. Pareto charts identify the "vital few" contributors to a problem but do not explore
causation. Run charts track data over time, and force field analysis examines driving and restraining
forces for change.
Q2. A nurse manager notices that medication administration errors have varied significantly over
the past 12 months, with some months showing improvement and others showing worsening.
Which quality tool would best display this pattern over time?
A. Fishbone diagram
B. Histogram
C. Control chart
D. Scatter diagram
Correct Answer: C. Control chart
Rationale: Control charts are specifically designed to track process performance over time and
distinguish between common cause variation (normal fluctuations) and special cause variation
(unexpected patterns). Fishbone diagrams identify potential causes, histograms show frequency
distributions, and scatter diagrams examine relationships between two variables.
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, Q3. During a quality improvement initiative to reduce hospital-acquired pressure injuries, the
team has identified the problem, analyzed contributing factors, and selected an intervention.
According to the PDSA cycle, what is the next step?
A. Act
B. Study
C. Plan
D. Do
Correct Answer: D. Do
Rationale: The PDSA cycle follows a logical sequence: Plan (identify problem and design change),
Do (implement the change on a small scale), Study (analyze results), and Act (standardize or modify).
After selecting an intervention, the team must implement or "Do" the change before studying its
effects.
Q4. A hospital administrator sets a quality goal: "Reduce central line-associated bloodstream
infections by 30% within the next 9 months." Which SMART criterion is most clearly demonstrated
by the phrase "within the next 9 months"?
A. Specific
B. Measurable
C. Time-bound
D. Achievable
Correct Answer: C. Time-bound
Rationale: The SMART framework requires goals to be Specific, Measurable, Achievable,
Relevant, and Time-bound. The phrase "within the next 9 months" establishes a clear deadline,
satisfying the time-bound criterion. The percentage reduction addresses measurability, and the
specific infection type addresses specificity.
Q5. A nurse reports a near-miss medication error where the wrong dose was prepared but
caught before administration. What should the nurse manager do first?
A. Conduct a safety huddle to discuss the event and identify system improvements
B. File a disciplinary report against the nurse who prepared the medication
C. Document the event and take no further action since no harm occurred
D. Ask the nurse to keep the event confidential to avoid alarming other staff
Correct Answer: A. Conduct a safety huddle to discuss the event and identify system
improvements
Rationale: Near-miss reporting is a critical component of a culture of safety. The first step should
be to learn from the event through discussion and system analysis. Punitive responses discourage
reporting, and ignoring near-misses forfeits valuable learning opportunities. Safety huddles allow
immediate discussion and identification of system improvements.
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, Q6. A quality improvement team is investigating why patients on a medical-surgical unit are
experiencing frequent falls. The team creates a diagram that categorizes potential causes into
people, environment, equipment, and processes. Which tool are they using?
A. Flowchart
B. Run chart
C. Fishbone (Ishikawa) diagram
D. Check sheet
Correct Answer: C. Fishbone (Ishikawa) diagram
Rationale: The fishbone diagram, also called an Ishikawa or cause-and-effect diagram, organizes
potential causes of a problem into categories. This visual tool helps teams systematically explore
contributing factors. Flowcharts display process steps, run charts track data over time, and check
sheets collect frequency data.
Q7. Which action best demonstrates a high-reliability organization's approach to patient safety?
A. Disciplining staff who report errors to maintain accountability
B. Encouraging staff at all levels to speak up about safety concerns
C. Assuming that established processes are inherently safe
D. Downplaying near-misses to maintain staff morale
Correct Answer: B. Encouraging staff at all levels to speak up about safety concerns
Rationale: High-reliability organizations cultivate a culture where all staff feel empowered to
identify and report safety concerns. They recognize that errors are opportunities for learning, not
punishment. Assuming processes are safe leads to complacency, and downplaying near-misses
prevents identification of system weaknesses.
Q8. A quality improvement team wants to identify which categories of medication errors occur
most frequently so they can prioritize improvement efforts. Which tool would be most useful for this
purpose?
A. Control chart
B. Pareto chart
C. Scatter diagram
D. Affinity diagram
Correct Answer: B. Pareto chart
Rationale: A Pareto chart combines a bar graph and a line graph to display the frequency of
different categories of a problem in descending order. This helps teams identify the "vital few"
categories that account for the majority of problems, enabling prioritization of improvement efforts.
Q9. A nurse manager observes that hand hygiene compliance rates have been steadily declining
over the past three months. This observation represents what type of measure?
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