CPHQ Exam Dumps - NAHQ CPHQ Certification Questions and Answers

The control chart illustrates that the wound infection rate is trending upward with several points at or above the upper control limit, indicating special cause variation. This means the system is out of control, signaling that the variation is not due to random chance (common causes) but due to assignable causes which must be identified and addressed (The Joint Commission, 2024; Institute for Healthcare Improvement, 2023).

Option A is incorrect because chance events would produce random variation within control limits, but here data points exceed the upper limit.

Option B is incorrect as an out-of-control process should not continue without investigation.

Option C describes common cause variation which would appear as stable variation within control limits.

Option D correctly indicates that the infection rate is out of control, requiring evaluation and intervention to identify root causes and reduce infections.

Based on the provided Pareto chart of general surgery readmission causes, the most significant causes should be addressed first to have the greatest impact on reducing readmissions.

Pareto Principle (80/20 Rule): The chart illustrates that a small number of causes contribute to the majority of the readmissions. The top three causes—pain, constipation, and PCP (Primary Care Provider) unavailable—account for the most significant portion of the readmissions.

Prioritization of Interventions: By addressing these top three causes first, thehealthcare team can potentially prevent the majority of readmissions, making the intervention more efficient and effective.

Strategic Focus: Focusing on pain, constipation, and the unavailability of PCPs aligns with the principle of focusing on the "vital few" causes rather than spreading resources thinly across many less significant issues.

The Institute for Healthcare Improvement (IHI) promotes collaborative approaches to quality improvement, emphasizing rapid-cycle testing to achieve measurable results. The model at the core of IHI’s methodology is well-documented in quality improvement frameworks.

Option A (DMAIC): DMAIC (Define, Measure, Analyze, Improve, Control) is a Six Sigma methodology focused on reducing variation, not the core of IHI’s approach, which emphasizes rapid testing.

Option B (PDSA): This is the correct answer. The NAHQ CPHQ study guide states, “The Plan-Do-Study-Act (PDSA) cycle is the core performance improvement model used by the Institute for Healthcare Improvement for its collaborative approach, enabling rapid-cycle testing and iterative improvements” (Domain 4). PDSA involves planning a change, testing it, studying results, and acting on findings, aligning with IHI’s Breakthrough Series model.

Option C (Lean): Lean focuses on eliminating waste, which IHI may incorporate, but it is not the primary model for IHI collaboratives.

Option D (Six Sigma): Six Sigma uses data-driven methods like DMAIC, not IHI’s rapid-cycle focus.

CPHQ Objective Reference: Domain 4: Performance and Process Improvement, Objective 4.3, “Apply performance improvement models,” emphasizes PDSA as IHI’s core methodology. The NAHQ study guide notes, “IHI’s collaborative approach relies on PDSA cycles to test and scale improvements across organizations” (Domain 4).

Rationale: PDSA’s rapid-cycle testing is central to IHI’s collaborative framework, enabling iterative improvements, as per CPHQ’s improvement principles.