Competing Against Luck / Jobs-to-be-Done — Clayton Christensen
Sources: Clayton Christensen’s Competing Against Luck (2016, with Taddy Hall, Karen Dillon, David S. Duncan), plus the 2005 HBR essay “Marketing Malpractice: The Cause and the Cure,” 2016 HBR cover story “Know Your Customers’ Jobs to Be Done,” and the field research with Bob Moesta at Re-Wired Group. URL: https://hbr.org/2016/09/know-your-customers-jobs-to-be-done
Summary
Jobs-to-be-Done (JTBD) is the foundational product framework Clayton Christensen introduced in 2005 and developed across a decade of research. Its central insight: “People don’t buy products, they hire them to do a job.” Customers don’t purchase features or belong to demographic segments — they hire products to make progress in specific circumstances. This reframe changes everything downstream: who your competitors are, how you interview customers, what features to prioritize, and how to position the product.
The canonical example is the milkshake story: a fast food chain (McDonald’s) asked Christensen to improve milkshake sales. Panel research had failed. When Bob Moesta interviewed people as they bought milkshakes, he discovered ~40% were sold before 8:30am to solo commuters whose job was “help me stay awake and occupied on my boring morning commute.” The competitors weren’t other milkshakes — they were bananas, bagels, donuts, and Snickers. The winning attributes (thick, lasts 20 minutes, fits in a cupholder) had nothing to do with flavor. The afternoon milkshake had a completely different job (parents placating kids) and a completely different competitive set (a trip to the toy store).
Jobs are durable (people have wanted to kill time on commutes for a century); solutions churn. Demographics tell you who bought; JTBD tells you why. Christensen: “The circumstances are more important than customer characteristics, product attributes, new technologies, or trends.”
Core Framework
A job is: the progress someone wants to make in a specific circumstance.
A job has three dimensions:
- Functional — the practical outcome (fuel the commute)
- Emotional — how the person wants to feel (productive, not bored)
- Social — how they want to be seen (responsible adult, not bagel-crumbs guy)
Missing the emotional/social layer is the #1 reason functionally-equivalent products lose.
Key Claims
- Products are hired, not bought — customers are making progress, not acquiring features
- Jobs are stable over time; solutions are not
- Demographics describe who bought, not why — they can’t predict purchase
- Competitors are anything that does the same job, across product categories
- Every job has functional, emotional, and social dimensions
- Personas are causally empty; job stories are causally rich
- The right time to interview is when someone just switched — the Four Forces are still fresh
- Circumstances matter more than characteristics
- Innovation success follows from understanding jobs; failure follows from optimizing features
- JTBD is upstream of positioning, feature prioritization, and market sizing
Adjacent Sources
This wiki treats Christensen as the canonical origin, but JTBD has multiple major contributors:
- Bob Moesta (Re-Wired Group, Demand-Side Sales 101) — interview methodology, Four Forces diagram, Switch Interview
- Intercom (Des Traynor, Paul Adams, free ebook Intercom on Jobs-to-be-Done) — SaaS application and the Job Story format
- Alan Klement (When Coffee and Kale Compete) — “progress” framing, jtbd.info community
- Tony Ulwick (Strategyn, What Customers Want) — Outcome-Driven Innovation, the quantitative practice version of JTBD
Concepts Referenced
- jobs-to-be-done
- customer-development
- ideation
- product-market-fit
- positioning
- minimum-viable-product
- mom-test