Within Decision Routines
Why experts still need checklists
The WHO surgical checklist shows how simple routines can reduce omissions and silence in expert work without replacing expertise.
On this page
- What the surgical checklist changed
- Why omissions happen in expert teams
- What decision routines can borrow carefully
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Introduction
The World Health Organization (WHO) Surgical Safety Checklist is one of the clearest demonstrations that highly skilled professionals still benefit from simple decision routines. Its importance is often misunderstood. The checklist was never designed to replace surgical expertise or force rigid compliance with a script. Instead, it was created to reduce ordinary human failures—missed steps, unspoken assumptions and communication breakdowns—that can occur even in expert teams working under pressure. The lesson extends beyond medicine: in any high-stakes decision, the greatest risks often come not from ignorance but from preventable omissions and failures to coordinate. The value of a checklist lies in making essential questions impossible to overlook before commitment. [New England Journal of Medicine]nejm.orgNew England Journal of MedicineA Surgical Safety Checklist to Reduce Morbidity and…by AB Haynes · 2009 · Cited by 7618 — A 19-item sur…
What the surgical checklist changed
Before the WHO checklist was introduced in 2008, surgical teams already possessed extensive technical knowledge. Yet operating theatres remained vulnerable to avoidable errors caused by complexity rather than incompetence. Multiple specialists, changing patient conditions, time pressure and dozens of small tasks created many opportunities for critical information to be lost.
The WHO checklist introduced a structured pause at three points during every operation:
- Before anaesthesia (“Sign In”): confirm patient identity, procedure, surgical site, allergies and essential equipment.
- Before the incision (“Time Out”): every team member introduces themselves, confirms the planned operation and raises anticipated concerns.
- Before leaving the operating theatre (“Sign Out”): verify instrument counts, specimen labels and postoperative plans. [World Health Organization]who.intWorld Health OrganizationSafe surgery: Tool and ResourcesThe WHO Surgical Safety Checklist was developed after extensive consultation aim…
The innovation was not the individual questions. Most were already considered good practice. The change was requiring them to be asked consistently, aloud and as a team rather than assuming someone had already checked.
The first multinational evaluation, involving eight hospitals in different healthcare systems, found substantial reductions in major complications and deaths following implementation of the 19-item checklist. While later studies have produced more varied estimates of effect, the original trial demonstrated that relatively small procedural changes could influence outcomes in complex environments. [New England Journal of Medicine]nejm.orgNew England Journal of MedicineA Surgical Safety Checklist to Reduce Morbidity and…by AB Haynes · 2009 · Cited by 7618 — A 19-item sur…
Why omissions happen in expert teams
The success of the checklist illustrates an important principle for decision-making: expertise does not eliminate human cognitive limits.
Experts usually fail through different mechanisms than novices.
Routine creates assumptions. When the same task has been performed hundreds of times, people naturally begin assuming that common steps have already been completed. These assumptions are efficient most of the time but become dangerous when circumstances differ.
Attention is limited. Complex work requires juggling many goals simultaneously. Remembering every important detail becomes increasingly difficult as workload increases.
Hierarchy discourages speaking up. Junior staff often notice potential problems but hesitate to interrupt senior colleagues. By explicitly inviting every participant to contribute during the “Time Out”, the checklist changes the social expectation from silence to participation.
Communication fragments. Different professionals frequently possess different pieces of relevant information. Without a structured moment to share them, critical knowledge may remain isolated within one person. Reviews of checklist implementation consistently identify improved communication and teamwork as major mechanisms behind better outcomes. [PMC+2PubMed]pmc.ncbi.nlm.nih.govPMCUse of the Surgical Safety Checklist to Improveby AE Pugel · 2015 · Cited by 223 — Use of a surgical safety checklist may prevent communication failures and reduce complications. In…
Importantly, the checklist addresses predictable human limitations rather than rare catastrophic mistakes. It reduces the chance that ordinary lapses accumulate into serious failures.
What decision routines can borrow carefully
The surgical checklist should not be copied literally outside medicine. Its transferable lessons concern process rather than content.
Protect against omissions, not judgement
A good checklist asks questions that should almost never be forgotten.
It does not attempt to calculate the right answer. Surgeons still decide how to perform an operation. The checklist merely ensures that obvious risks have been considered before action begins.
The same distinction applies to strategic, financial or organisational decisions. A routine should verify that critical questions have been addressed without pretending to replace expert reasoning.
Create deliberate pauses before commitment
One of the checklist’s most valuable features is timing.
Rather than interrupting constantly, it inserts brief pauses immediately before irreversible actions. In decision-making generally, similar “commitment points” may include signing a contract, launching a product, making a major investment or announcing a public decision.
A short pause creates an opportunity to detect overlooked information before the costs of changing course become much higher.
Make disagreement legitimate
The checklist gives every team member permission—and responsibility—to voice concerns.
For non-medical decisions, an equivalent routine might include asking:
- What assumption worries you most?
- What evidence would change our minds?
- What important risk have we not discussed?
- Does anyone see a reason not to proceed?
These questions reduce the likelihood that agreement simply reflects social pressure.
Standardise the questions, not the answers
The WHO checklist is remarkably brief because it focuses on universal safety checks rather than prescribing technical decisions.
Decision routines work best when they standardise the process of thinking while leaving room for professional judgement about the content.
The evidence is strong—but not simple
The checklist has become a landmark patient-safety intervention, yet its effectiveness is more nuanced than early headlines suggested.
Subsequent systematic reviews and meta-analyses generally find improvements in teamwork, communication and many patient outcomes after checklist implementation. However, the size of the benefit varies considerably between hospitals and countries. [PubMed+2PMC]pubmed.ncbi.nlm.nih.govMeta-analysis of Surgical Safety Checklist Effects on…by VE Lyons · 2014 · Cited by 132 — The results indicate that surgical saf…
Some large observational studies reported little or no improvement after mandatory adoption. These findings prompted researchers to ask why similar checklists sometimes produced different results. [The Sanders Law Firm]thesandersfirm.comThe Sanders Law FirmNew Study Questions Efficacy Of Surgical Safety ChecklistsThe New England Journal of Medicine recently published a st…
The emerging explanation is that the checklist itself is only part of the intervention.
Hospitals achieving the greatest improvements typically showed several common characteristics:
- active leadership support;
- genuine participation by the whole team;
- adaptation of the checklist to local workflows;
- regular training and reinforcement;
- a culture where concerns could be raised without punishment. [PMC+2Wiley Online Library]pmc.ncbi.nlm.nih.govEvaluating the Impact of the World Health Organization's…by L Alsadoun · 2024 · Cited by 22 — This systematic review evaluates the…
A checklist completed mechanically as paperwork provides much less protection than one used as a structured conversation.
This distinction matters when borrowing lessons for decision-making. Simply creating a written checklist rarely changes outcomes. The routine succeeds when it changes behaviour.
Why this matters beyond surgery
The broader lesson is not that every important decision requires a formal checklist. Rather, it is that complex, consequential work frequently fails through ordinary human limitations rather than dramatic incompetence.
For decisions with high stakes, a short routine can improve reliability by ensuring that people:
- confirm the objective before acting;
- expose assumptions that have remained implicit;
- invite challenge before commitment;
- verify critical facts that are easy to overlook under pressure;
- leave with a shared understanding of the next steps.
These routines introduce a small amount of productive friction at precisely the moment when overconfidence, haste or hierarchy might otherwise allow preventable mistakes to pass unnoticed.
The WHO Surgical Safety Checklist demonstrates that the greatest contribution of a checklist is often not remembering one more fact. It is creating a reliable moment in which experts stop, communicate and think together before acting. New England Journal of Medicine+2World Health Organization [nejm.org]nejm.orgNew England Journal of MedicineA Surgical Safety Checklist to Reduce Morbidity and…by AB Haynes · 2009 · Cited by 7618 — A 19-item sur…
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Further Reading
Books and field guides related to Why experts still need checklists. Use these as the next step if you want deeper reading beyond the article.
The Checklist Manifesto
Directly covers surgical checklists and extends the lesson to aviation, construction, finance, and complex work.
Better
Explores how professionals improve performance through diligence, measurement, and attention to preventable failure.
Decisive
Provides practical routines for reducing avoidable judgement errors before committing to choices.
Thinking, Fast and Slow
Explains why skilled people still make predictable mistakes and why process safeguards matter.
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Endnotes
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Source: who.int
Link: https://www.who.int/teams/integrated-health-services/patient-safety/research/safe-surgery/tool-and-resourcesSource snippet
World Health OrganizationSafe surgery: Tool and ResourcesThe WHO Surgical Safety Checklist was developed after extensive consultation aim...
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Source: pmc.ncbi.nlm.nih.gov
Title: PMCUse of the Surgical Safety Checklist to Improve
Link: https://pmc.ncbi.nlm.nih.gov/articles/PMC4417373/Source snippet
by AE Pugel · 2015 · Cited by 223 — Use of a surgical safety checklist may prevent communication failures and reduce complications. In...
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Source: pmc.ncbi.nlm.nih.gov
Link: https://pmc.ncbi.nlm.nih.gov/articles/PMC5881961/Source snippet
by ET Willassen · 2018 · Cited by 67 — In 2008, the World Health Organization (WHO) introduced the Safe Surgery checklist (SSC) as a s...
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Source: pmc.ncbi.nlm.nih.gov
Title: PMCThe Role of WHO Surgical Checklists in Reducing
Link: https://pmc.ncbi.nlm.nih.gov/articles/PMC11536331/Source snippet
by S Qaiser · 2024 · Cited by 9 — The application of the WHO Surgical Safety Checklist has been shown to improve surgical outcomes by...
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Source: pmc.ncbi.nlm.nih.gov
Link: https://pmc.ncbi.nlm.nih.gov/articles/PMC11493453/Source snippet
Evaluating the Impact of the World Health Organization's...by L Alsadoun · 2024 · Cited by 22 — This systematic review evaluates the...
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Source: onlinelibrary.wiley.com
Link: https://onlinelibrary.wiley.com/doi/10.1111/jan.15841Source snippet
Wiley Online LibraryBarriers and facilitators associated with the implementation...7 Sept 2023 — This qualitative systematic review aime...
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Source: who.int
Link: https://www.who.int/teams/integrated-health-services/patient-safety/research/safe-surgerySource snippet
Safe surgeryThe Surgical Safety Checklist has been shown to reduce complications and mortality by over 30 percent. The Checklist is simpl...
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Source: nejm.org
Link: https://www.nejm.org/doi/full/10.1056/NEJMsa0810119Source snippet
New England Journal of MedicineA Surgical Safety Checklist to Reduce Morbidity and...by AB Haynes · 2009 · Cited by 7618 — A 19-item sur...
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Source: qualitysafety.bmj.com
Link: https://qualitysafety.bmj.com/content/23/4/299Source snippet
Quality & Safety in Health CareSurgical checklists: a systematic review of impacts and...by JR Treadwell · 2014 · Cited by 771 — Surgica...
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Source: pubmed.ncbi.nlm.nih.gov
Link: https://pubmed.ncbi.nlm.nih.gov/24068073/Source snippet
Meta-analysis of Surgical Safety Checklist Effects on...by VE Lyons · 2014 · Cited by 132 — The results indicate that surgical saf...
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Source: thesandersfirm.com
Link: https://thesandersfirm.com/news/study-questions-efficacy-surgical-safety-checklists/Source snippet
The Sanders Law FirmNew Study Questions Efficacy Of Surgical Safety ChecklistsThe New England Journal of Medicine recently published a st...
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Source: ncbi.nlm.nih.gov
Link: https://www.ncbi.nlm.nih.gov/books/NBK138100/Source snippet
Surgical safety checklists: a review - NCBIby R Tang · 2014 · Cited by 103 — Meta-analysis of surgical safety checklist effects on te...
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Source: journalofsurgicalresearch.com
Link: https://www.journalofsurgicalresearch.com/article/S0022-4804%2818%2930658-9/abstractSource snippet
World Health Organization Surgical Safety Checklist...by I Solsky · 2020 · Cited by 55 — The World Health Organization's (WHO) surgical...
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Source: pmc.ncbi.nlm.nih.gov
Link: https://pmc.ncbi.nlm.nih.gov/articles/PMC3489074/Source snippet
by A Fudickar · 2012 · Cited by 289 — The beneficial effect of the WHO checklist on perioperative complication rates indicates that co...
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Source: ncbi.nlm.nih.gov
Title: appa m1
Link: https://www.ncbi.nlm.nih.gov/books/NBK143241/bin/appa-m1.pdfSource snippet
Surgical Safety Checklist to Reduce Morbidity and...by AB Haynes · 2009 · Cited by 7614 — We hypothesized that a program to implement a...
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Source: pubmed.ncbi.nlm.nih.gov
Link: https://pubmed.ncbi.nlm.nih.gov/19144931/Source snippet
surgical safety checklist to reduce morbidity and mortality...by AB Haynes · 2009 · Cited by 7618 — A 19-item surgical safety checklist...
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Source: nejm.org
Link: https://www.nejm.org/doi/full/10.1056/NEJMsa1204720Source snippet
Simulation-Based Trial of Surgical-Crisis Checklistsby AF Arriaga · 2013 · Cited by 741 — Checklist use during operating-room crises resu...
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Source: england.nhs.uk
Title: surgical safety checklist
Link: https://www.england.nhs.uk/2019/01/surgical-safety-checklist/Source snippet
Decade of improved outcomes for patients thanks to...21 Jan 2019 — The Surgical Safety Checklist is a simple tool designed to improve co...
Additional References
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Source: psnet.ahrq.gov
Title: surgical safety checklist reduce morbidity and mortality global population
Link: https://psnet.ahrq.gov/issue/surgical-safety-checklist-reduce-morbidity-and-mortality-global-populationSource snippet
surgical safety checklist to reduce morbidity and mortality in...This study's senior author, Atul Gawande, wrote about the success of ch...
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Source: researchgate.net
Link: https://www.researchgate.net/publication/23789023_A_Surgical_Safety_Checklist_to_Reduce_Morbidity_and_Mortality_in_a_Global_PopulationSource snippet
(PDF) A Surgical Safety Checklist to Reduce Morbidity and...29 Jan 2009 — A 19-item surgical safety checklist designed to improve team c...
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Source: cureus.com
Link: https://www.cureus.com/articles/291906-evaluating-the-impact-of-the-world-health-organizations-surgical-safety-checklist-on-clinical-outcomes-and-implementation-strategies-a-systematic-reviewSource snippet
Evaluating the Impact of the World Health Organization's...21 Sept 2024 — The WHO Surgical Safety Checklist significantly reduced compli...
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Source: researchgate.net
Link: https://www.researchgate.net/publication/44654530_The_WHO_surgical_safety_checklistSource snippet
(PDF) The WHO surgical safety checklistThe World Health Organisation has introduced a three-phase checklist to reduce error and improve t...
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Source: merriam-webster.com
Link: https://www.merriam-webster.com/dictionary/surgical -
Source: scribd.com
Link: https://www.scribd.com/document/986371251/%D8%A8%D8%AD%D8%AB-%D8%AA%D9%85%D8%B1%D9%8A%D8%B6-1 -
Source: lifebox.org
Link: https://www.lifebox.org/wp-content/uploads/2022/08/Checking-In-On-the-Checklist-web.pdfSource snippet
anization) Surgical Safety Checklist—a two-minute, single-page protocol with 19 items for reducing preventable...Read more...
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Source: news.harvard.edu
Title: surgical safety checklist drops deaths and complications by more than one third
Link: https://news.harvard.edu/gazette/story/2009/01/surgical-safety-checklist-drops-deaths-and-complications-by-more-than-one-third/Source snippet
safety checklist drops deaths and complications...14 Jan 2009 — The use of a simple surgical checklist during major operations can lower...
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Source: patientsafetysolutions.com
Title: May 2019 WHO Surgical Safety Checklist Cut Mortality 37 Percent in Scotland
Link: https://www.patientsafetysolutions.com/docs/May_2019_WHO_Surgical_Safety_Checklist_Cut_Mortality_37_Percent_in_Scotland.htmSource snippet
WHO Surgical Safety Checklist Cut Mortality 37% in ScotlandHaynes and colleagues (Haynes 2009) demonstrated that mortality at 30-days pos...
Published: May 2019
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Source: anaesthetics.ukzn.ac.za
Title: FMM No 8 The World Health Organisation Surgical Safety Checklist 2 S Zwane
Link: https://anaesthetics.ukzn.ac.za/Libraries/ICU_1/FMM_No_8The_World_Health_Organisation_Surgical_Safety_Checklist_2-_S_Zwane.pdfSource snippet
World Health Organisation Surgical Safety Checklistby SF Zwane · 2016 · Cited by 1 — The evaluation of the surgical safety checklist show...
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