Can you imagine a more important change than one in the relationship between intellectual curiosity and money? These are two of the most powerful forces in the world, and in my lifetime they've become significantly more aligned. How could you not be fascinated to watch something like this happening in real time?

n OBJECTIVE, I explained, is simply WHAT is to be achieved, no more and no less. By definition, objectives are significant, concrete, action oriented, and (ideally) inspirational. When properly designed and deployed, they’re a vaccine against fuzzy thinking—and fuzzy execution. KEY RESULTS benchmark and monitor HOW we get to the objective. Effective KRs are specific and time-bound, aggressive yet realistic. Most of all, they are measurable and verifiable. (As prize pupil Marissa Mayer would say, “It’s not a key result unless it has a number.”) You either meet a key result’s requirements or you don’t; there is no gray area, no room for doubt. At the end of the designated period, typically a quarter, we declare the key result fulfilled or not. Where an objective can be long-lived, rolled over for a year or longer, key results evolve as the work progresses. Once they are all completed, the objective is necessarily achieved. (And if it isn’t, the OKR was poorly designed in the first place.)

Bottom-up OKRs work hand in glove with “20 percent time,” which frees grassroots engineers to dive into promising side projects.

Many companies have a “rule of seven,” limiting managers to a maximum of seven direct reports. In some cases, Google has flipped the rule to a minimum of seven. (When Jonathan Rosenberg headed Google’s product team, he had as many as 20.) The higher the ratio of reports, the flatter the org chart—which means less top-down oversight, greater frontline autonomy, and more fertile soil for the next breakthrough. OKRs help make all of these good things possible.

In October 2018, for the 75th consecutive quarter, Google’s CEO will lead the entire company to evaluate its progress against top-level objectives and key results. In November and December, each team and product area will develop its own plans for the coming year and distill them into OKRs. The following January, as CEO Sundar Pichai told me, “We’ll go back in front of the company and articulate, ‘This is our high-level strategy, and here are the OKRs we have written for the year.’” (In accordance with company tradition, the executive team will also grade Google’s OKRs from the prior year, with failures unblinkingly dissected.) Over the following weeks and months, thousands of Googlers will formulate, discuss, revise, and grade their team and individual OKRs. As always, they’ll have carte blanche to browse their intranet and see how other teams are measuring success. They’ll be able to trace how their work connects up, down, and sideways—how it fits into Google’s big picture.

Objectives and key results drive clarity, accountability, and the uninhibited pursuit of greatness. Take it from Eric Schmidt, who credits OKRs with “changing the course of the company forever.”