Checklists: when we can’t trust our brains

From product launches to project management, I’m obsessed with checklists. And I’m not the only one. From the World Health Organization’s surgical safety checklist to flight checklists and more mundane event production checklists, checklists are everywhere. We use them to run businesses, perform complex surgery, and do our groceries.

Systemic complexity means that we cannot rely on our memory alone to know what to do and when to know it: checklists are a comforting tool allowing us to unload some of the cognitive stress of living our lives to an outside helper.

There is no doubt that doctors and astronauts are smart. Yet, they rely heavily on checklists in their day-to-day work. No matter how much expertise we accumulate, we are still human. We are vulnerable to basic errors. And checklists are a useful tool to protect ourselves from some of the most blatant ones.

Checklists

Avoiding terrible mistakes

Last year, hours into a brain surgery, Kenyan doctors realised there was no blood clot in the brain of their patient. They were operating on the wrong man. People on social media have expressed shock at the horrifying mix-up, which could have been prevented by simply checking the patient’s identification tag.

This simple task is part of the World Health Organization’s surgical safety checklist, a 19-item list which aims at preventing the kind of frightening error that was made during the Kenyan’s man surgery. Its development was led by American surgeon and public-health researcher Atul Gawande. It lists simple but essential items to review over the course of the three stages of a surgery, such as “confirm the patient identity”, “confirm the patient’s procedure and where the incision will be made”, or “confirm any known allergies”.

“It somehow feels beneath us to use a checklist, an embarrassment,” says Atul Gawande in his book The Checklist Manifesto. Yet, the systems we have to navigate have become so complex that it would be foolish to rely on memory alone and expect to perform at our best.

In 1935, an anticipated model of Boeing crashed during a demonstration flight, killing two crew members. This incident resulted in the creation of the very first official checklist. Because of all the new technology that had been added and that a pilot had to use during takeoff, flight, landing, and taxiing, it had become impossible for one person to remember all the complicated steps involved in safely flying a plane.

Since then, checklists have become ubiquitous, and for good reason. They were in fact so important to the 1969 moon landing that Apollo 11 crew member Michael Collins called them the “fourth crew member”. In fact, each Apollo 11 astronaut logged more than a hundred hours familiarising themselves with their checklists, and the launch operations checklist was more than a hundred pages long.

Checklists

The ideal checklist

First, let’s make sure it’s clear: checklists are not to-do lists. While a to-do list is a list of tasks to be performed, which could be in a random order and without any defined goal, a check-list is a well-defined list of conditions to mark as true before a task can be performed. You could have a checklist for launching a product, cleaning the house, or buying a new car, but your daily to-do list is not a checklist.

  1. Keep it to one page. According to Atul Gawande, the ideal number of pages that a checklist should have is just one. Yes, astronauts may use longer ones, but I’m going to go on a limb here and assume you’re not an astronaut. Shorter is better. This will reduce the cognitive load and make your checklist much more manageable.
  2. Define a clear objective. As discussed earlier, do not create a laundry list of tasks. Instead, work your way back from the objective and make sure that you list all of the necessary conditions before you’re ready to go.
  3. [Optional] Add owners and deadlines. If this is a collective checklist and you are working as part of a team, it can be useful to associate each item with an owner and a deadline. This will help you and the team move smoothly through the checklist and ensure the right item owner knows what they have to work on.

This process is all about getting important steps out of your brain and into an external tool. It will ensure you make fewer mistakes and reduce your stress levels. Once you start getting used to them, you will see how useful checklists can be in all areas of your work.

Checklists

The power of checklists

Checklists may sound like simple tools, but they can be extremely powerful if used properly.

  • Launch better products. In 1999, Apple created an internal checklist called the ANPP, short for Apple New Product Process. It’s a detailed playbook outlining the step-by-step secret recipe Apple uses to design, prototype, and launch any new product.
  • Make better decisions. According to Atul Gawande, many successful investors use checklists to decide whether or not to bet on a company. These are based on hard data, market potential, the entrepreneur’s skills set, but also previous failures experienced by the VC fund itself.
  • Do better work. Checklists are also a way to ensure everyone is on the same page and can perform at their best. Hard rock band Van Halen included a clause in their contract specifying that local contractors needed to put a bowl of M&Ms backstage, with the brown ones removed. This may seem like a silly demand, but the M&Ms were actually used as an indicator of whether the contractors had read through the entire checklist and whether everyone was thus ready for the show.

Next time you have a big project or if you’re currently working on one, give it a try and create a checklist. If it’s a team project, make sure to seek the input of your team members. A collaborative checklist is even more powerful.


Anne-Laure Le Cunff

I’m an ex-Googler, entrepreneur, and part-time neuroscience student at King’s College. If you found this article useful, subscribe to my weekly newsletter about mindful productivity.

As a thank you for joining the Maker Mind family, you will receive a welcome gift: 30 mental models to add to your thinking toolbox.

Mental Models Toolbox


Get your weekly dose of science-based insights