Vital Numbers
Vital Numbers are the small set of measurements, usually 3 to 5, that actually drive a system's outcome.
Everything else is reporting.
They work on any system. A company has Vital Numbers. So does a body, and so does a marriage, though nobody writes those down and that is usually the problem.
Result numbers and activity numbers
A Vital Number can be either, and most systems need both.
Result numbers are the outcome you are actually after. Revenue. Body fat percentage. They are what the goal gets written in, and they are what you measure yourself against.
Activity numbers are what you can move this week. Gym sessions. Hours of sleep. Glasses of water. Proposals sent.
Neither is enough alone. The result number tells you whether it worked. The activity number tells you what to do on Monday. A system measured only on results will tell you it failed, months after you could have done anything about it.
How to find them
A Vital Number is one where movement in the number tracks movement in the thing you actually care about, and where somewhere in the chain there is an action a human can take.
The number itself does not have to be directly controllable. Nobody moves revenue by pushing on revenue. It qualifies because the chain underneath it is actionable, not because you can reach out and change the figure.
Why 3 to 5
Below 3 and you are not looking at a system, you are looking at a number. Above 5 and no one can hold them in their head, which means no one acts on them.
Seven is already a lot. Most teams who insist they need 7 have 2 Vital Numbers and 5 things they are anxious about.
How they cascade
Result numbers cascade down into activity numbers.
Wanting a six-pack is not a plan. Body fat percentage is the result number, and underneath it sit gym sessions per week, grams of protein, hours of sleep, and water. Those are the numbers you can actually do something about tonight.
The same shape holds in a company. Revenue is the result; proposals sent, close rate, and delivery time are the activities underneath it. When the chain is intact, anyone looking at their own number can see how it reaches the outcome. When it breaks, you get a top-line number nobody below the top can affect, and a set of activities that do not add up to anything.
Common mistake
Confusing Vital Numbers with key performance indicators.
Most indicator sets are comprehensive by design, and comprehensiveness is the opposite of the goal here. Vital Numbers are ruthless by design.
You review them on a rhythm fast enough to act inside of. For the business ones specifically, with formulas and benchmarks, the Ultra CFO™ Field Guide is the catalog.