By Eric Andrew Kristof, RN, CAHIMS | Healthcare IT Professional | HIMSS Arkansas Chapter Member
About This Series: The HIMSS Word of the Day is a running blog series drawing from the HIMSS Dictionary of Health Information and Technology Terms, Acronyms, and Organizations, 6th Edition (2025) — the authoritative reference for healthcare IT professionals and the primary study resource for CAHIMS and CPHIMS certification. Each post paraphrases the term in plain language, grounds it in real-world healthcare IT context, and adds a bedside nursing perspective you won’t find in a textbook.
📖 The Term: Usability
Source: HIMSS Dictionary of Health Information and Technology Terms, Acronyms, and Organizations, 6th Edition (2025)
🔍 Plain-Language Definition
Usability in healthcare IT is the extent to which clinicians and other users can accomplish specified tasks in specified contexts of use with effectiveness, efficiency, and satisfaction. In plainer language: can the person in front of the screen do what they need to do, in a reasonable amount of time, without wanting to throw the mouse across the room?
Usability is a design attribute of a system, evaluated through usability testing — the systematic evaluation of a product with representative users completing typical tasks, while trained observers watch, listen, and take notes. The goal of usability testing is to identify problems, collect qualitative and quantitative data, and determine the participant’s satisfaction with the product.
Usability rests on five well-established dimensions:
| Dimension | Meaning |
|---|---|
| Learnability | How quickly can a new user accomplish basic tasks the first time they encounter the system? |
| Efficiency | Once users have learned the system, how quickly can they perform tasks in the flow of real work? |
| Memorability | When a user returns to the system after not using it for a while, how quickly do they regain proficiency? |
| Errors | How many errors do users make, how severe are they, and how easily can users recover from them? |
| Satisfaction | How pleasant is the system to use, and how willing are users to keep using it? |
⚠️ Exam Alert: Distinguish usability (a design attribute of the system) from usability testing (the evaluation method), user experience (UX) (the broader emotional and pragmatic experience across the entire product lifecycle), user acceptance testing (UAT) (a specific pre-deployment test of whether the system meets business requirements), and human factors engineering (the discipline of designing systems around human capabilities and limitations). CAHIMS questions swap these terms deliberately.
🌐 Why It Matters: Real-World Healthcare IT Context
Poor EHR usability is one of the single most-documented drivers of clinician burnout.
Multiple large-scale studies over the past decade have connected EHR usability scores in the “F” range (as measured by validated instruments like the System Usability Scale, or SUS) to burnout, cognitive load, and clinician intent to leave the profession. When a system that clinicians spend six hours a day inside is fundamentally hard to use, the downstream effects ripple through patient safety, workforce retention, and organizational cost.
The ONC Health IT Certification Program now includes usability as a certification criterion. Certified EHR Technology (CEHRT) must demonstrate user-centered design processes and provide usability test summaries. The HHS SAFER Guides (Safety Assurance Factors for EHR Resilience) explicitly address usability and safe use as intertwined domains. Usability is no longer just a design consideration; it is a regulatory and patient safety concern.
Failure modes of poor healthcare IT usability:
- Excessive clicks and screen changes for routine tasks
- Cognitive load from too many simultaneous fields, alerts, and tasks
- Inconsistent interface behavior across modules within the same EHR
- Poor default values that require override on every use
- Errors surfaced without clear recovery pathways
- Documentation burden as a primary driver of after-hours “pajama time” charting
- Alert fatigue as a specific usability failure of clinical decision support
Strengths of mature healthcare IT usability practice:
- User-centered design (UCD) processes with clinician involvement from requirements through validation
- Usability testing at multiple stages: early wireframes, prototypes, and pre-release builds
- Human factors engineering embedded in the informatics team
- Post-implementation usability monitoring using tools like the SUS
- Personalization and role-based defaults that reduce repetitive work
- Design system consistency across modules and vendor products
- Explicit executive accountability for usability outcomes, not just adoption metrics
The organizations that have invested in usability discipline see measurable returns in clinician satisfaction, reduced documentation time, and — critically — reduced patient safety events attributable to the EHR.
🏥 The Nurse’s Perspective: Clinical, Bedside, & Workflow
Nurses are, without exaggeration, the most usability-affected group of EHR users in the healthcare workforce.
At the Bedside
Nurses spend more time in the EHR than any other clinical role. Assessments, vitals, medications, care plans, education, handoffs, and every documentation requirement for regulatory and reimbursement purposes flow through nursing hands. When the EHR requires 12 clicks to complete a routine task, and 30 nurses on a floor perform that task 100 times a shift, the cumulative usability cost is enormous.
Every unnecessary click is time not spent with the patient. Every confusing screen is cognitive load added to an already high-stakes environment. Every workaround developed to defeat a badly designed workflow creates a data quality and patient safety risk. Nurses know all of this intimately, even without ever saying the word “usability.”
In Clinical Workflow
Nursing usability manifests in the specific texture of daily practice: how many taps to give a medication, how many screens to complete an admission assessment, whether the flowsheet defaults reflect this particular patient’s care needs, whether the barcode scanner works consistently, whether the workstation-on-wheels connects to Wi-Fi in every room. These are not “IT issues” — they are the core determinants of whether the shift ends on time and whether the patient gets the care they need.
Nurse-led informatics involvement in EHR design, build, and optimization is not a nice-to-have. It is the mechanism through which nursing workflow reality enters the design process. When nurses are involved from the start, the resulting systems are dramatically more usable in nursing hands. When they are consulted at the end, or not at all, the resulting systems create the burden that drives burnout.
In EHR Implementation (Go-Live Perspective)
During Epic Go-Lives, usability decisions made months before the cut-over date determine what nurses experience on Day 1. Flowsheet row selection, hard-stop placement, order-set structure, documentation template design, and Best Practice Advisory (BPA) tuning are all usability decisions.
End-user support analysts during Go-Live encounter usability problems constantly — sometimes as explicit complaints (“this screen is impossible”) and sometimes as observed workarounds (nurses developing hacks to defeat a badly designed workflow). Capturing that feedback in a structured way, distinguishing individual training gaps from systemic usability defects, and routing systemic issues to the optimization team is one of the highest-value functions of Go-Live support.
The nursing workforce lives or leaves an EHR based on its usability. Informatics teams that treat usability as a first-class concern are building for retention, safety, and quality; teams that treat it as an afterthought are unknowingly building for burnout.
🎓 CAHIMS / CPHIMS & HIMSS Perspective
CAHIMS Exam Domain Mapping
Usability appears prominently across CAHIMS exam domains:
| CAHIMS Domain | How Usability Appears |
|---|---|
| Clinical Informatics | The primary domain; user-centered design, usability testing methodologies, alert fatigue as a usability failure, and clinician burnout drivers |
| Healthcare & Technology Environments | ONC Certified EHR Technology usability criteria; SAFER Guides; NIST usability frameworks |
| Healthcare Information & Systems Management | Usability testing in the implementation lifecycle; personalization and role-based configuration; post-implementation optimization |
| Management & Leadership | Executive accountability for usability outcomes; change management for design decisions; usability’s role in workforce retention |
Key Terms to Know Alongside Usability
- Usability Testing — the systematic evaluation of a product with representative users completing typical tasks; distinct from usability itself
- User-Centered Design (UCD) — the design philosophy that places end-user needs and workflows at the center of every design decision
- User Experience (UX) — the broader emotional and pragmatic experience of the user across the entire product lifecycle; encompasses but is not limited to usability
- Human Factors Engineering — the discipline of designing systems around human capabilities, limitations, and cognitive load
- System Usability Scale (SUS) — a widely used 10-question validated instrument for measuring usability with a single 0–100 score
- SAFER Guides — the ONC’s Safety Assurance Factors for EHR Resilience; a set of self-assessment tools that link usability to patient safety
HIMSS Organizational Position
HIMSS supports EHR usability through its Nursing Informatics and Physician communities, public policy engagement on certification and clinician burden, and Global Health Conference programming. Its digital health maturity models, including EMRAM, also reward organizations for adopting technology in ways clinicians can actually use safely.
🔗 Explore Further: External References
- ONC — Health IT Certification Program https://healthit.gov/certification-health-it/about-onc-health-it-certification-program/
- ONC SAFER Guides https://healthit.gov/clinical-quality-and-safety/safer-guides/
- NIST — Health Information Technology Usability https://www.nist.gov/programs-projects/health-information-technology-usability
- Nielsen Norman Group — Usability 101 Introduction https://www.nngroup.com/articles/usability-101-introduction-to-usability/
- AHRQ — Human Factors Engineering in Healthcare https://psnet.ahrq.gov/primer/human-factors-engineering
- HIMSS — Nursing Informatics Community https://www.himss.org/networking/communities/nursing-informatics/
Term source: HIMSS Dictionary of Health Information and Technology Terms, Acronyms, and Organizations, 6th Edition (2025). All definitions in this series are paraphrased for editorial purposes. Readers are encouraged to consult the primary source for exact language.
Eric Andrew Kristof, RN, CAHIMS is a Healthcare IT professional and HIMSS Arkansas Chapter member based in Hot Springs Village, AR, with hands-on Epic Go-Live experience and a diverse healthcare and IT background. He writes at kristof.org at the intersection of clinical care and healthcare technology.
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