Why a coin flip is sometimes the best decision-making tool
When decision quality is low and decision cost is high, you should just spin.
We treat all decisions as if they deserve careful thought, and that's a problem. Most don't. Whether you have Thai or Italian tonight, whether you go to the gym at 6 or 7, whether your team picks library A or library B for the new prototype — most of these have a roughly equal expected outcome, and the time spent picking is wasted.
The two axes that matter
There's a useful way to slice decisions: how much does the outcome vary, and how expensive is the deciding process?
High variance, low cost to decide: Where to buy a house. Whether to take the job. These deserve real thought. Sit down, write it out, sleep on it.
Low variance, low cost to decide: What socks to wear. Pick whichever's on top. You're already done.
High variance, high cost to decide: Hard. These are the genuinely difficult decisions in life. No shortcut.
Low variance, high cost to decide: This is the wheel's territory. The outcomes are roughly equivalent, but for some reason — too many options, too many people, sunk cost in the debate — actually making the call is expensive. Just spin.
Why deliberation hurts here
Three things go wrong when you over-deliberate a low-variance decision:
Loss aversion kicks in. The longer you weigh options, the more you start to see what you'd be giving up by picking either one. The fear of choosing wrong grows even though the actual cost of choosing wrong hasn't changed.
The cost compounds. If three of you spend ten minutes debating where to eat, that's thirty person-minutes for a decision that doesn't matter. Do this five times a week and you've burned an evening.
The wrong person decides. In groups, "deliberation" often means the most opinionated person gradually wears everyone else down. The outcome isn't the best one; it's the one chosen by the loudest voice. Randomness is at least fair.
The pre-commit trick
The wheel only works if you agree to live with the result before you spin. If you're going to renegotiate after seeing the answer, you're not using a randomiser — you're using a slow ratchet for whichever option you preferred all along.
This pre-commit step is the whole game. It transforms "spinning" from a fun gimmick into an actual decision-making tool. It also tends to reveal preferences: if someone really hates the idea of pre-committing to the spin's result, that means they have an option they actually want, and you can save the trouble by just doing that.
When not to spin
Don't outsource decisions you'll have to live with for years. Don't outsource decisions where one of the options is obviously irresponsible (no, "buy a motorbike" should not be on the wheel against "save the deposit"). Don't outsource decisions that other people are going to hold you accountable for — they'll hold you accountable for them whether you chose carefully or spun a wheel.
The wheel is for things that don't matter much. Use it ruthlessly there, and you'll find you have more time and energy for the things that do.