Jeff Bezos is known for his demanding style

In the relentlessly efficient world of Jeffrey P. Bezos, Amazon employees quickly learn when they have overtaxed the attention of their chief executive. He quietly pulls out his smartphone and starts replying to e-mails. In extreme cases, Bezos will walk out.

This demanding style is as much a signature of the Amazon.com founder as his famously long-term approach to developing new products or services, say people who have worked with the man who this week agreed to buy The Washington Post for $250 million. Bezos (pronounced “BAY-zohs”) has developed a precise and inventive approach to management that has powered Amazon to the top ranks of U.S. technology companies.

He favors a nimble, loosely organized company in which “two-pizza teams” execute important corporate tasks, because a work group requiring three pizzas over a lunch meeting is inherently too cumbersome. And he often requires employees pitching new ideas to write mock news releases for their product’s imagined launch, a way of focusing their minds on what will most excite customers.

Bezos has no patience for bureaucracy, and employees are encouraged to put a stop to anything that smacks of jumping through hoops. A rule requiring that employees who brought their dogs to work sign in the animals disappeared soon after complaints.

Bezos also disdains the formality of job titles, encouraging employees to work outside the scope of their titles if it helps the company.

One of the most coveted honors at Amazon is the “Just Do It” award, given to an employee every couple of months who strays from his or her job title to do something that will help Amazon. Bezos helps choose the employee himself and then hands the award — an old Nike shoe — to the winner at a company-wide event.

“Most things at Amazon are viewed as an experiment,” said Jason Crawford, who worked at Amazon as a development manager from 2004 to 2007. “And that means a few things: You don’t assume it’s going to work before you try it, but that’s also okay. The goal is try things. We’re going to measure them and find out if they work.”

“Jeff has always been very efficient,” said Jason Kilar, who worked at Amazon from 1997 to 2006, rising to the level of senior vice president. “There is one very important thing he knows is not in abundant supply on Earth, and that is minutes.”