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Suzy Welch · Kahneman · Annie Duke Monte Carlo · 6,000 trials

10-10-10 Decision Making ToolWelch Dial + Regret Monte Carlo

The 10-10-10 framework, Suzy Welch's 2009 classic, asks how a decision feels in 10 minutes, 10 months and 10 years. This tool turns that into a three-sector dial with a composite regret needle, side-by-side A/B option cards, and a Monte Carlo simulation that adds noise to your scores to estimate expected regret. Built on Welch (10-10-10), Daniel Kahneman's Thinking, Fast and Slow (2011), and Annie Duke's How to Decide (2020).

Composite Δ
+3.50
A favoured
A score
6.00
Option A
B score
2.50
Option B
Verdict
Choose A
MC regret A 0.01 · B 1.90

Pick a common decision scenario

Six pre-loaded scenarios from the Welch case-bank, then you customize.

10-10-10 Dial

10-10-10 Decision DialCircular dial divided into 10 minutes, 10 months, and 10 years sectors with a composite regret needle showing Option A vs Option B.10 minutesΔ +8.0 A10 monthsΔ -1.0 B10 yearsΔ +5.0 ACHOOSE Acomposite Δ +3.50

10-year horizon weighted 60% · 10-month 30% · 10-min 10%

10 minutes feel+6
10 months feel+4
10 years feel+7
10 minutes feel-2
10 months feel+5
10 years feel+2

Monte Carlo Regret Score · 6,000 trials

A regret
0.01
Net dollar/utility regret · lower is safer
B regret
1.90
Reversibility shrinks regret weight

The simulation perturbs your scores with horizon-scaled noise (10min σ=0.8, 10mo σ=2.2, 10yr σ=3.8) reflecting that long-horizon predictions are noisier. Reversibility shrinks the regret tail because you can change your mind.

Reality-check insights

What the dial means

The dial weights the 10-year horizon at 60% — consistent with Suzy Welch's observation that nearly all important decisions resolve clearly when projected forward a decade. Daniel Kahneman called the same effect “mental time-traveling” in Thinking, Fast and Slow (2011) — deliberately invoking System 2 to override System 1's recency bias. If your composite Δ flips sign between the 10-min and 10-year sector, you are watching System 1 and System 2 disagree in real time.

Where to look first

  • Type 1 vs Type 2: Jeff Bezos' framework. Type-1 (irreversible) decisions need slow consensus; Type-2 (reversible) deserve fast, two-way-door choices. Use the reversibility slider.
  • Resulting bias (Annie Duke): don't judge a decision by its outcome — a good decision can have a bad outcome, and vice versa.
  • Affect heuristic: the 10-minute score is often pure emotion. If A.10min » A.10yr, you may be chasing relief, not progress.
  • Optionality: Nassim Taleb's rule — prefer the option that creates more future options. Slide optionality up for the choice that opens doors.
  • If both options score within 1.5 of each other, the dial says too close. Don't flip a coin — revisit your scores or run a 3rd option.
  • Bezos: a Type-1 decision deserves 9 hours of deliberation; a Type-2 deserves 9 minutes. Match the rigor to the reversibility.

One-way vs two-way door map

Reversibility versus optionality decision quadrant2x2 map: x-axis reversibility (one-way to two-way door), y-axis optionality (closes to opens doors), with options A and B plotted.DELIBERATEirreversible · opens doorsJUST DECIDEreversible · opens doorsSLOW DOWNone-way door · closes doorsEXPERIMENTreversible · closes doorsReversibility → (one-way to two-way door)Optionality → (opens doors)AB

Jeff Bezos' door test

In his 1997 and 2015 shareholder letters, Bezos split decisions into type-1 (one-way doors — irreversible, decide slowly with deliberation) and type-2 (two-way doors — reversible, decide fast and let the people closest decide). Plotting reversibility against optionality tells you how much rigour the decision deserves, which is the question the 10/10/10 score cannot answer on its own.

  • A:Option A sits in the Deliberate quadrant — a one-way door, so slow down and gather evidence.
  • B:Option B sits in the Experiment quadrant.
  • If either option is a one-way door that closes future options (bottom-left), the 10-year horizon should dominate your weighting — drag the dial weights accordingly.

Complementary frameworks (use after the dial)

FrameworkWhen to useSource
10-10-10Default — quick clarity across horizonsWelch, "10-10-10" (Scribner 2009)
Regret MinimizationLong-horizon irreversible (career, relationships)Bezos (1994) — recounted in Brad Stone, "The Everything Store" (2013)
Type 1 / Type 2 DoorSpeed-vs-rigor calibrationBezos 2015 Letter to Shareholders
PremortemHigh-cost irreversible plansGary Klein, Harvard Business Review (2007)
Eisenhower MatrixUrgency × importance routingEisenhower (1954) — popularized by Covey "7 Habits" (1989)
"Hell Yes or No"Optional commitments under attention scarcityDerek Sivers, "Hell Yeah or No" (2020)
Decision tree + EVQuantifiable outcomes with probabilityAnnie Duke, "Thinking in Bets" (2018)
InversionAvoiding catastrophic outcomesCharlie Munger speeches 1980-2020

The math

Score(option)  = 0.10 × feel(10min) + 0.30 × feel(10mo) + 0.60 × feel(10yr)
Composite Δ    = Score(A) − Score(B)

Monte Carlo regret per trial:
  realA = perturb(A) with horizon-scaled σ
  realB = perturb(B) with horizon-scaled σ
  regret(chosen)  = max(0, real(other) − real(chosen)) × (1 − reversibility × 0.5)
                                                       × (1.3 if optionality < 0.4 else 1)

Mean regret = Σ regret / trials  →  lower is safer
Worked example: A.feel = (+6, +4, +7) → ScoreA = 0.6 + 1.2 + 4.2 = 6.0. B.feel = (−2, +5, +2) → ScoreB = −0.2 + 1.5 + 1.2 = 2.5. Composite Δ = +3.5 → Choose A. The 10-min feel alone would have favored A by 8 pts, but the 60% weight on 10-yr is what locks the verdict.

How to use the 10-10-10 dial

  1. 1Pick a preset OR write your two options. Be brutally specific — "take the job" vs "stay" not "yes" vs "no".
  2. 2For each option, score how you'll feel in 10 minutes, 10 months, and 10 years on a −10..+10 scale.
  3. 3Set the reversibility (Bezos Type-1 vs Type-2) and optionality (Taleb optionality) sliders for each option.
  4. 4Read the dial — the composite needle weights the 10-year horizon heaviest because Welch found that is where the right answer usually lives.
  5. 5Cross-check with the Monte Carlo regret panel. If both regrets are low and similar, you have a fast Type-2 decision. If A regret >> B regret, the simulation says don't pick A.

Why this calculator exists

In 2026, a founder weighing a $5M seed at a $25M post-money cap against bootstrapping to $1M ARR has 72 hours to decide. A pros-and-cons list flattens the time dimension; a regret-minimization thought experiment skips the immediate emotional reality. The 10-10-10 framework, named by Suzy Welch in her 2009 book of the same title, is the canonical reconciliation: project the decision forward across three time scales and notice where the answer stabilizes.

The framework's theoretical foundation comes from Daniel Kahneman's Thinking, Fast and Slow (Farrar, Straus & Giroux 2011). System 1 — the fast, emotional, “10-minutes-from-now” brain — gets the first say. System 2 — the slower, deliberate, “10-years-from-now” brain — is what we want to hear. The dial is a forced switch from System 1 to System 2, weighted 60% on the long horizon because Kahneman demonstrated that long-horizon prediction averages out short-term affect.

Annie Duke's How to Decide (Portfolio 2020) extended this with the “resulting” bias: never judge a decision by its outcome — only by the process. A great Welch-style decision can still produce a bad result because life is probabilistic. That insight is what powers the Monte Carlo panel: 6,000 perturbed re-runs of your scores estimate expected regret rather than betting on the single point estimate. Jeff Bezos's 1994 regret-minimization story (he calculated regret-at-80 for staying at a hedge fund vs starting Amazon) is the most famous case where the dial answer was an extreme outlier on the 10-year horizon.

Bezos's Type-1 / Type-2 framework (formalized in the 2015 Amazon shareholder letter) explains the reversibility slider. A Type-1 decision — one-way door — deserves deliberation, premortems and slow consensus. A Type-2 decision — two-way door — deserves fast experiments. The Monte Carlo shrinks the regret tail for high-reversibility options because you can change your mind.

Nassim Taleb's “optionality” (Antifragile, 2012) supplies the third slider. Decisions that close doors are penalized; decisions that create future options are rewarded. This is why the tool also recommends a third option whenever the composite Δ is between −1.5 and +1.5: when neither path dominates, a hybrid option that preserves optionality often beats both A and B.

Pair this with the advertising ROI calculator (decisions about marketing budget reallocation) and the partnership ROI tool (decisions about which partner channels to invest in). The dial frames the irreversibility; the calculators frame the financial math.

Last reviewed: 2026-06. Sources: Suzy Welch, “10-10-10: A Life-Transforming Idea” (Scribner 2009); Daniel Kahneman, “Thinking, Fast and Slow” (FSG 2011); Annie Duke, “How to Decide” (Portfolio 2020); Annie Duke, “Thinking in Bets” (Portfolio 2018); Nassim Taleb, “Antifragile” (Random House 2012); Jeff Bezos 2015 Amazon Letter to Shareholders.

Frequently Asked Questions

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What Users Say

4.9
Based on 6,210 reviews

“Used the dial to decide whether to take a $5M seed at a $20M cap or bootstrap. The 10-year sector showed I cared more about ownership than runway. Bootstrapped, hit $1M ARR in 11 months. The Monte Carlo regret on the bootstrapped path was 40% of the funded path.”

D
Daniel Park
Founder &amp; CEO — early-stage SaaS
May 3, 2026

“I run this dial with every executive coaching client before any career move. The reversibility slider has stopped at least four bad job switches in the last quarter because the candidates realized the move was Type-1 and didn't pencil out at year 10.”

L
Lillian Chen
Senior Director — Strategy Consulting
April 9, 2026

“The composite Δ flipped sign on me twice during the same decision because I kept refining the scores. That iteration is the entire point — Kahneman would approve. Ended up choosing the option with more optionality, and three months later it paid off.”

M
Marcus Adebayo
Product Lead — Enterprise SaaS
March 18, 2026

“I teach Welch + Kahneman + Duke as a stack, and this is the first tool I've seen that actually integrates all three. The Monte Carlo panel especially separates this from every other 10-10-10 worksheet floating around the internet.”

Y
Yuki Tanaka
Founder &amp; Coach — Decision Strategy
February 26, 2026

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