II. OVERVIEW OF EXISTING QUALITY IMPROVEMENT/ HAZARD PREVENTION MODELS

Essential Features of Health Care Quality

The Chasm report identifies six attributes for a quality health care system: (1) safe, (2) effective, (3) patient centered, (4) timely, (5) efficient, and (6) equitable.1 Safety is a preeminent feature of health care quality, first on the list, though not the only one. Health care quality may be thought of as a circle, with each of the six essential features forming smaller overlapping circles within the larger whole.

Over the past 60 years, many models have been developed to help organizations improve quality and enhance safety. Among the methodologies discussed here, we distinguish between tools that address all six aspects of quality versus tools with an explicit focus on safety and hazard analysis. General QI tools can be used to improve timeliness, efficiency, and other goals in addition to safety. PHA tools are more prescriptive and require more steps, including documentation; in cases where a tool is applied to an ongoing service operation (i.e., HACCP), it becomes a part of a firm’s daily functioning.2 This distinction provides the framework for discussion in this paper of the various methodologies:

Quality Improvement Tools (QI)

Proactive Hazard Analysis Tools (PHA)

Total Quality Management—TQM

Failure Mode and Effect Analysis—FMEA

Continuous Quality Improvement—CQI

Healthcare Failure Mode and Effect Analysis—HFMEA™

Toyota Production System

Hazard Analysis and Critical Control Points—HACCP

Six Sigma

Hazard and Operability Studies—HAZOP

Probabilistic Risk Assessment—PRA

For comparative purposes, we also include discussion of Root Cause Analysis under PHA tools. Following is a brief outline of each approach, describing purpose and features, a thumbnail history, and key applications. Tables D–1 and D–2 summarize key points.

1. Quality Improvement Tools: TQM/CQI, Toyota Production System, Six Sigma

The three approaches we will describe can be used to improve all aspects of quality and are not targeted specifically at hazard prevention. Still,



The National Academies | 500 Fifth St. N.W. | Washington, D.C. 20001
Copyright © National Academy of Sciences. All rights reserved.
Terms of Use and Privacy Statement