Chart — Leadership & Management
Quality Improvement Models Comparison
Major QI frameworks compared — PDSA, Lean, Six Sigma, Root Cause Analysis, and IHI Model: focus, steps, typical use, and nursing application for NCLEX and clinical leadership.
Educational use only. QI frameworks and their application vary by facility and healthcare system. This material supports nursing education and exam review. It is not medical advice and is not a substitute for clinical judgment, institutional policy, or medical direction. Always follow facility protocols and current provider orders.
QI Models Comparison
| Model | Focus | Key Steps | Typical Use | Nursing Role |
|---|---|---|---|---|
| PDSA Cycle | Iterative small-scale testing of changes | Plan → Do → Study → Act | Unit-level process changes, protocol implementation, reducing fall rates | Most common QI method in nursing; frontline nurses participate in all four phases |
| Lean | Eliminating waste in processes to improve efficiency and value | Identify value → Map value stream → Create flow → Establish pull → Pursue perfection | Reducing bed turnover time, eliminating redundant documentation steps, improving discharge efficiency | Nurses identify non-value-added steps; time-motion studies; workflow redesign |
| Six Sigma | Reducing defects and variation to near-zero error rates | DMAIC: Define → Measure → Analyze → Improve → Control | Reducing medication errors, improving lab turnaround time, surgical infection rates | Data collection, statistical analysis, process control charts; often led by QI specialists with nurse input |
| Root Cause Analysis (RCA) | Identifying the underlying systemic cause of adverse events | Event identification → Team assembly → Event description → Timeline → Causal factor analysis → Root cause identification → Corrective action plan | After sentinel events, serious adverse events, or recurrent near-misses | Frontline nurses provide perspective on what happened; contribute to corrective action design |
| IHI Model for Improvement | Answering three fundamental questions before and during any change | What are we trying to accomplish? How will we know if the change is an improvement? What changes can we make that will result in improvement? → then PDSA | Framework used before initiating any PDSA cycle in hospital settings | Used to frame QI project goals, metrics, and change ideas before testing begins |
Event Types & Required Responses
| Event Type | Definition | Example | Response Required |
|---|---|---|---|
| Near-miss | Error caught before reaching the patient | Wrong medication drawn up but caught before administration | Report, investigate, prevent recurrence |
| Adverse event | Harm resulting from healthcare management (not the underlying disease) | Patient fall with injury during hospitalization | Incident report, RCA if serious |
| Sentinel event | Unexpected death or serious physical/psychological harm | Wrong-site surgery, medication error causing death | Mandatory RCA, TJC reporting |
| Never event | Serious preventable event that should never occur in any setting | Retained foreign object after surgery | CMS non-payment, mandatory reporting |
Just Culture Framework
| Behavior | Description | Management Response |
|---|---|---|
| Human error | Unintentional mistake within a flawed system | Console the individual; fix the system |
| At-risk behavior | Shortcuts taken without recognizing the associated risk | Coach; increase risk awareness; remove incentives for shortcuts |
| Reckless behavior | Consciously choosing to ignore a substantial, known risk | Discipline; remediate; remove from role if necessary |
Related Resources
Standards & sources
Fact-checked Jun 21, 2026This page is written to align with IHI Model for Improvement; ISMP Medication Error Reporting; The Joint Commission Sentinel Event Policy; AHRQ Patient Safety Indicators. It is an educational summary, not a citation of any single document — always verify specific doses, values, and protocols against current guidelines and your facility policy. How we source content →