# Project management
Project management is the application of knowledge, skills, tools, and techniques to a temporary endeavor undertaken to create a unique product, service, or result, governed by international standards such as ISO 21502:2020, which gives guidelines applicable to any organization and any type of project regardless of purpose, delivery approach, life cycle model, complexity, size, cost, or duration[1](https://www.iso.org/standard/74947.html). Unlike operations management, which runs the ongoing business, a project ends; and the benefits a project creates are typically realized later by operations, not by the project team[2](https://www.researchgate.net/publication/222689147_The_real_success_factors_on_projects).
| Key fact | Detail |
|---|---|
| Standard definition | ISO 21502:2020 covers any project and explicitly allows predictive, incremental, iterative, adaptive, or hybrid delivery, including agile[1](https://www.iso.org/standard/74947.html) |
| IT success rate | Standish CHAOS data: 31% success rate for IT projects in 2020–2024, up only from ~29% in 2015–2017[3](https://pmworldjournal.com/wp-content/uploads/2026/01/pmwj160-Jan2026-Arcidiacono-research-on-IT-project-failure-rate-2025-update.pdf) |
| Overruns | Mean budget overrun 4% vs mean schedule overrun 16% across more than 70 large organizations[2](https://www.researchgate.net/publication/222689147_The_real_success_factors_on_projects) |
| Dominant approach | Hybrid use rose 57% from 20% in 2020 to 31.5% in 2023, while predictive fell from 58% to 43.9%[4](https://globalprojectperformance.com/media/yezisde1/pmi-pulse-of-the-profession-2024-report.pdf) |
| Approach vs outcome | A 477-project study found no statistical difference among predictive, agile, and hybrid on budget, schedule, and scope/quality targets[5](https://www.pmi.org/-/media/pmi/documents/public/pdf/publications/pmj/research-summaries/pmj-practitioner-insights_agile-traditional-hybrid-approaches-project-success.pdf) |
| Certification premium | US PMP holders report a median salary of $135,000, nearly 24% higher than non-holders[6](https://www.pmi.org/about/press-media/2026/in-an-ai-economy-judgment-is-the-new-job-security) |
| AI adoption | 74% of organizations use AI-supported practices; 82% expect great to very great AI impact on project management by 2030[7](https://www.pmsolutions.com/uploads/files/uploads/files/The-State-of-Project-Management-2026-Research-Report-and-Data.pdf) |
## What project management is
ISO 21502:2020, published in December 2020, is deliberately method-neutral: its note states that the delivery approach can be any method or process suited to the type of outputs, such as predictive, incremental, iterative, adaptive, or hybrid, including agile approaches[1](https://www.iso.org/standard/74947.html). The standard covers project management only, not program or portfolio management[1](https://www.iso.org/standard/74947.html).
The boundary with operations management is clearest at the point of benefits. Peter Cooke-Davies's empirical study across more than 70 large organizations found that benefits are not delivered or realized by the project manager and project team; they require the actions of operations management, so an effective benefits-delivery process spanning both is critical to project success[2](https://www.researchgate.net/publication/222689147_The_real_success_factors_on_projects). The same study found that keeping project or stage duration below 3 years correlated with on-time performance[2](https://www.researchgate.net/publication/222689147_The_real_success_factors_on_projects).
## The iron triangle and success criteria
Early project-success frameworks focused on efficiency criteria, commonly called the "iron triangle" (also "golden triangle" or "holy trinity"), encompassing time, cost, and quality[8](https://pmc.ncbi.nlm.nih.gov/articles/PMC10703200/). After 2000, integrative models added stakeholder satisfaction, business benefits, community and environmental impact, and investment returns, reflecting the view that delivering on time and budget says little about whether a project produced value[8](https://pmc.ncbi.nlm.nih.gov/articles/PMC10703200/).
The shift matters for measurement. PMI's 2026 Pulse of the [Profession](https://www.edgepedia.org/profession) research reports that 31% of complex projects fail to achieve the full scope of their originally intended benefits, more than twice the 12% rate in its 2024 Maximizing Project Success research[9](https://www.pmi.org/-/media/pmi/documents/public/pdf/learning/thought-leadership/pulse-of-the-profession_2026_pdf.pdf?rev=). A project can hit its triple-constraint targets and still count as a failure under a benefits-based definition, and vice versa.
## Methodologies and how they compare
**The main families.** [Waterfall](https://www.edgepedia.org/waterfall) is linear, with progress flowing in one direction; agile draws on the Agile Manifesto's 12 principles; [Scrum](https://www.edgepedia.org/scrum-software-development) breaks work into sprints usually lasting one to four weeks with planning, stand-ups, and reviews; [Kanban](https://www.edgepedia.org/kanban-development) uses a visual board with cards moving through columns to expose bottlenecks[10](https://www.investopedia.com/terms/p/project-management.asp).
**Hybrid now dominates.** Hybrid project management, a combination of predictive and adaptive approaches, is a widely used approach; a contingency study identified six hybrid types, including sequential forms such as "Water-Scrum-Fall" and "Waterfall-Agile"[11](https://www.sciencesphere.org/ijispm/archive/ijispm-140103.pdf). PMI's survey data agree: hybrid use rose from 20% in 2020 to 31.5% in 2023 while predictive declined from 58% to 43.9%[4](https://globalprojectperformance.com/media/yezisde1/pmi-pulse-of-the-profession-2024-report.pdf).
**Fit depends on requirement stability.** In one empirical study, projects with fixed requirements (20% of the sample) correlated with predictive approaches, while medium-stability requirements (54%) predominantly used hybrid; predictive and hybrid projects showed higher budget and schedule adherence, while adaptive and hybrid excelled in stakeholder satisfaction[12](https://managementpapers.polsl.pl/wp-content/uploads/2025/02/215-Stronczek-%C5%9Aciga%C5%82a.pdf). A bimodal governance proposal makes the same point structurally: predictable projects suit Waterfall or V-Model with iron-triangle metrics, exploratory projects suit Agile or Lean Startup with adoption and time-to-value metrics, and failure often results from applying the wrong mode's governance[3](https://pmworldjournal.com/wp-content/uploads/2026/01/pmwj160-Jan2026-Arcidiacono-research-on-IT-project-failure-rate-2025-update.pdf).
**What the comparison studies actually find.** A survey of 477 cross-industry projects, of which over 50% were governed with a hybrid approach (agile 15%, traditional 33%), found no statistical difference among the three approaches on attainment of budget, schedule, and scope/quality targets[5](https://www.pmi.org/-/media/pmi/documents/public/pdf/publications/pmj/research-summaries/pmj-practitioner-insights_agile-traditional-hybrid-approaches-project-success.pdf). Agile and hybrid projects did produce significantly higher stakeholder success, meaning sponsor, client, and team satisfaction, than traditional projects[5](https://www.pmi.org/-/media/pmi/documents/public/pdf/publications/pmj/research-summaries/pmj-practitioner-insights_agile-traditional-hybrid-approaches-project-success.pdf). The choice of approach, in other words, moves satisfaction more reliably than it moves the triple constraint.
## How it works in practice
**The working day.** A typical project manager's day is roughly a third meetings, a third focused planning and review, and a third unplanned work such as escalations, questions, and firefighting; practitioners describe the day shattering into 15-minute fragments as the single biggest cause of burnout[13](https://doitify.com/planning/a-day-in-the-life-of-a-project-manager/).
**Risk management often fails quietly.** In a study of 21 information-systems projects across 10 organizations, in all but five the project manager had disengaged from formal risk management before ever executing a risk response[14](https://fieldway.org/blog/i-wrote-down-eight-risks-all-eight-happened-nobody-moved). A five-year survey of project teams found that in high-risk situations, upward risk communication failed about 79% of the time, rising to roughly 97% misalignment in the most dangerous conditions[14](https://fieldway.org/blog/i-wrote-down-eight-risks-all-eight-happened-nobody-moved). Kutsch and Hall identified "taboo" as a rationale for leaving known risks alone: naming a risk clearly might get the project canceled[14](https://fieldway.org/blog/i-wrote-down-eight-risks-all-eight-happened-nobody-moved).
**Estimation.** Reference-class forecasting, developed by Bent Flyvbjerg building on [Daniel Kahneman](https://www.edgepedia.org/daniel-kahneman) and [Amos Tversky](https://www.edgepedia.org/amos-tversky)'s [planning fallacy](https://www.edgepedia.org/planning-fallacy), replaces the inside view of building up a cost and duration estimate from a project's specific details with the statistical distribution of actual outcomes of a reference class of comparable completed projects[15](https://incertive.com/blog/why-projects-fail-and-how-to-beat-the-odds). Its premise is empirical: estimators systematically underestimate because they reason from the specific plan rather than from how similar projects actually turned out.
## By the numbers
Failure statistics depend heavily on definitions. The Standish Group's 1994 CHAOS Report found only 16% of software projects completed on time, on budget, and with all originally specified features; by 2015 the success definition had been revised to "on time, on budget, with a satisfactory result", a looser bar[15](https://incertive.com/blog/why-projects-fail-and-how-to-beat-the-odds). On the current definition, CHAOS data show success rising only from about 29% in 2015–2017 to 31% in 2020–2024, with roughly 50% of projects challenged and about 19% failed outright in both periods[3](https://pmworldjournal.com/wp-content/uploads/2026/01/pmwj160-Jan2026-Arcidiacono-research-on-IT-project-failure-rate-2025-update.pdf).
Scale changes the stakes. A McKinsey study with Bent Flyvbjerg's Oxford group of more than 5,400 large IT projects found 17% went so badly they threatened the company's existence[15](https://incertive.com/blog/why-projects-fail-and-how-to-beat-the-odds). Against the CHAOS figures, Cooke-Davies's sample of large organizations showed mean budget escalation of 4% and mean schedule slippage of 16%, a reminder that "overrun" averages and "failure" rates measure different things on different populations[2](https://www.researchgate.net/publication/222689147_The_real_success_factors_on_projects).
Two sources report a genuine disagreement on whether methodology changes IT success rates: the 2025 longitudinal update reads CHAOS data as roughly uniform across methods (31% success, ~50% challenged, ~19% failed)[3](https://pmworldjournal.com/wp-content/uploads/2026/01/pmwj160-Jan2026-Arcidiacono-research-on-IT-project-failure-rate-2025-update.pdf), while another analysis reports agile projects at about 42% success versus about 26% for waterfall over 2020–2024[15](https://incertive.com/blog/why-projects-fail-and-how-to-beat-the-odds). The two cannot both describe the same population, and the discrepancy is unresolved.
Institutional infrastructure is expanding. 79% of organizations have a PMO in place or in development, up from 69%, with a median PMO age of 10 years and an average annual budget of US$225,000[7](https://www.pmsolutions.com/uploads/files/uploads/files/The-State-of-Project-Management-2026-Research-Report-and-Data.pdf). PMI projects organizations will need up to 30 million new project professionals by 2035[6](https://www.pmi.org/about/press-media/2026/in-an-ai-economy-judgment-is-the-new-job-security).
## Certifications and the profession
The PMP ([Project Management Professional](https://www.edgepedia.org/project-management-professional)) is the best-documented credential. PMI refreshed the exam on 9 July 2026, changing domain weightings to People 33%, Process 41%, and Business Environment 26% (from 42/50/8), adding AI, sustainability, and stakeholder engagement content, and expanding eligibility with a 10-year experience window[6](https://www.pmi.org/about/press-media/2026/in-an-ai-economy-judgment-is-the-new-job-security). PMI research shows US PMP holders report a median salary of $135,000, nearly 24% higher than those without it, and PMP certifications granted increased 36% year over year in the first five months of 2026[6](https://www.pmi.org/about/press-media/2026/in-an-ai-economy-judgment-is-the-new-job-security).
Two caveats apply. The salary premium is self-reported survey data from the certifying body, and it shows correlation with income, not prediction of project success.
## Recent developments
**AI adoption is broad but its measured payoff is modest so far.** A PRISMA systematic review of 97 studies (2011–2024) found AI applications concentrated on cost estimation, duration forecasting, and risk assessment, with Random Forest and XGBoost consistently outperforming other models[16](https://www.mdpi.com/2073-431X/14/2/66). On the adoption side, 74% of organizations say they use AI-supported practices and 82% expect great to very great AI impact by 2030, yet PMOs score lowest at incorporating AI into practices, 2.5 on a 1–5 scale[7](https://www.pmsolutions.com/uploads/files/uploads/files/The-State-of-Project-Management-2026-Research-Report-and-Data.pdf).
The measured productivity evidence is more sobering. A 2026 Atlassian/DX longitudinal study across professional engineering teams found AI usage increased by 65% while overall developer velocity topped out at a 15% increase, with many organizations seeing gains averaging 10%[17](https://www.atlassian.com/blog/company-news/ai-sdlc). Atlassian's July 2026 Jira release adds assigning work items to coding agents and agent session monitoring[17](https://www.atlassian.com/blog/company-news/ai-sdlc). Generative AI projects themselves fail at high rates: between 70% and 85% fail to move beyond Proof of Concept according to [RAND Corporation](https://www.edgepedia.org/rand-corporation) 2024 estimates, and Gartner predicted 30% of GenAI projects would be abandoned post-PoC by end of 2025[3](https://pmworldjournal.com/wp-content/uploads/2026/01/pmwj160-Jan2026-Arcidiacono-research-on-IT-project-failure-rate-2025-update.pdf).
**Work location reshaped coordination.** 61% of senior leaders say work-from-anywhere arrangements were the number one factor changing how teams deliver projects over the last three years, though only 61% of project professionals themselves work remotely one day a week or more[4](https://globalprojectperformance.com/media/yezisde1/pmi-pulse-of-the-profession-2024-report.pdf).
**Complexity is rising.** 97% of project professionals managed at least one complex project in the past year, and 81% say projects have become more complex, with 91% reporting increasing complexity in organizations of 100,000+ employees versus 78% in organizations under 500[9](https://www.pmi.org/-/media/pmi/documents/public/pdf/learning/thought-leadership/pulse-of-the-profession_2026_pdf.pdf?rev=).
## References
1. [ISO 21502:2020 – Project, programme and portfolio management — Guidance on project management, ISO](https://www.iso.org/standard/74947.html)
2. [Cooke-Davies, T. The 'real' success factors on projects, International Journal of Project Management](https://www.researchgate.net/publication/222689147_The_real_success_factors_on_projects)
3. [Arcidiacono, G. et al. Comparative research on IT project failure rates: A 2025 longitudinal update, PM World Journal (Jan 2026)](https://pmworldjournal.com/wp-content/uploads/2026/01/pmwj160-Jan2026-Arcidiacono-research-on-IT-project-failure-rate-2025-update.pdf)
4. [PMI Pulse of the Profession 2024 (15th annual)](https://globalprojectperformance.com/media/yezisde1/pmi-pulse-of-the-profession-2024-report.pdf)
5. [Agile, Traditional, and Hybrid Approaches to Project Success, PMI Practitioner Insights (Project Management Journal)](https://www.pmi.org/-/media/pmi/documents/public/pdf/publications/pmj/research-summaries/pmj-practitioner-insights_agile-traditional-hybrid-approaches-project-success.pdf)
6. [In an AI Economy, Judgment Is the New Job Security: PMI Refreshes the PMP Certification (2026)](https://www.pmi.org/about/press-media/2026/in-an-ai-economy-judgment-is-the-new-job-security)
7. [The State of Project Management 2026, PM Solutions](https://www.pmsolutions.com/uploads/files/uploads/files/The-State-of-Project-Management-2026-Research-Report-and-Data.pdf)
8. [How do project managers' competencies impact project success? A systematic literature review, PMC](https://pmc.ncbi.nlm.nih.gov/articles/PMC10703200/)
9. [PMI Pulse of the Profession 2026 (complexity)](https://www.pmi.org/-/media/pmi/documents/public/pdf/learning/thought-leadership/pulse-of-the-profession_2026_pdf.pdf?rev=)
10. [Project Management: Key Types and Methodologies, Investopedia](https://www.investopedia.com/terms/p/project-management.asp)
11. [Designing a fitting hybrid project management approach: a contingency perspective, IJISPM](https://www.sciencesphere.org/ijispm/archive/ijispm-140103.pdf)
12. [Optimizing the selection of project management approaches – research findings, Management Papers](https://managementpapers.polsl.pl/wp-content/uploads/2025/02/215-Stronczek-%C5%9Aciga%C5%82a.pdf)
13. [A Day in the Life of a Project Manager, Doitify](https://doitify.com/planning/a-day-in-the-life-of-a-project-manager/)
14. [I Wrote Down Eight Risks. All Eight Happened. Nobody Moved., Fieldway](https://fieldway.org/blog/i-wrote-down-eight-risks-all-eight-happened-nobody-moved)
15. [Why Projects Fail and How to Beat the Odds, Incertive](https://incertive.com/blog/why-projects-fail-and-how-to-beat-the-odds)
16. [Leveraging Artificial Intelligence in Project Management: A Systematic Review, MDPI](https://www.mdpi.com/2073-431X/14/2/66)
17. [How we're evolving Jira for AI-native software development, Atlassian](https://www.atlassian.com/blog/company-news/ai-sdlc)
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*Topic: Encyclopedia › Society and history › Economics and business › Business and work › Business and work overview › Management and workplace › Project and operations management*
*Initially written Sep 17, 2026 · Reviewed: Sep 30, 2026; Oct 10, 2026 · Edited: Sep 30, 2026; Oct 10, 2026; Oct 11, 2026; Oct 15, 2026 · Last review: Oct 10, 2026*
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License: Edgepedia Community License 1.0, https://www.edgepedia.org/edgepedia/license