Lastly, the checklist involves a Time Out: this requires that everything stops and no one interrupts. In an emergency, or under extreme time pressure, it is difficult to get everyone on the team to stop what they are doing and attend completely. The loss of team discussion under time pressure has been described by some centres implementing the Safe Surgery checklist.6 ,13 These are the times when mistakes are most likely to occur, yet paradoxically also when the Time Out portion of the checklist (the briefing to support complex work) is least likely to be performed as intended.
Checklists make it easy to delegate tasks if someone offers to help you. If you are lucky enough to have assistance, you can refer to your list and know what to ask them to do right away. You can even share your list with them and let them pick what appeals to them. The disadvantage to delegating in this way is losing control when other people choose what they want to do. If you are concerned about giving away easy tasks and getting stuck with the challenges, keep your list to yourself.
Most companies strive to arrange their best practices in the most convenient way. Checklists work well here. Providing essential information for repetitive tasks in the form of a list proves a company’s consistent approach to any level of activity. As an example, introducing specific rules and policies to new team members is quite practical when done through checklists.
B-17 Bombers. You’re likely familiar with the iconic B-17 “Flying Fortress” Bomber. But did you know if it weren’t for a simple checklist, it never would have gained its renown in WWII? In the 1930s, the U.S. Army Air Corps held a competition for airplane manufacturers vying to secure a contract to build the military’s next long-range bomber. Boeing produced a plane that could carry five times as many bombs as the army requested, and flew faster and further than previous bombers. On the day Boeing demonstrated its Flying Fortress, the plane lifted off the tarmac, stalled at 300 feet, and then crashed in a fiery explosion.
In healthcare, this type of operational check of equipment has evolved along with advanced medical technology. Since 1993, Anaesthesia Apparatus Checkout Recommendations have targeted the proper configuration of anaesthesia gas delivery systems.9 These recommendations are intended to be peer-reviewed, modified and updated for each specific type of manufactured anaesthesia equipment. Thus, prechecks are incorporated into manufacturing and inservicing of equipment and iteratively updated by the professionals using them. Operating room and anaesthesia workflows accommodate these prechecks.
Checklists put everything you need to do right in front of you. You can see the beginning, middle and end of what needs to be done. Though this helps some people tackle tasks in front of them, it can also be distracting. If you are the type who prefers to take things one step at a time, you might enjoy working through a checklist. Big picture people might struggle with a large collection of isolated items, however, and might need other tools such as mind maps, ideas lists and deadline reminders to help them focus on what needs to be done.
Let’s take a simple example. When you get in a car, you can’t just drive because there is a set of specific operations to be done. These include fastening your seat belt, removing the handbrake, putting a transmission gear lever into neutral position, starting the engine, checking the indicators, etc. After you have checked and accomplished all these routine tasks, you can press the accelerator pedal and drive. Every driver has this checklist in his/her memory because of its regular use. If your set of tasks is bigger or varies frequently, it’s challenging to keep it memorized all the time.
Non-boldface checklists are used to provide decision support when time is not critical. In complicated situations, such as multiple system failures, the checklist appears in the form of a flow chart or decision tree, helping the pilot(s) to navigate the process. In modern aircraft, the checklist is built into the electronic cockpit system, which leads the pilots through the appropriate steps on the screen. The steps are colour-coded for urgency and ranked in priority order. As steps are completed, they disappear from the screen. Checklist items are arranged in a systems operational sequence and are consistent with the patterns of motor and eye movements of the crew.

Every construction job begins with a massive checklist of tasks that have to get done and each task has an accompanying deadline. While that to-do list plays an important role in ensuring stuff gets done, an equally valuable checklist is also used. Called a “submittal schedule,” it centers on communication. The submittal schedule details which project managers need to talk to which project managers during a specific phase and about a specific process. The submittal schedule’s purpose is to get teams that are working on different yet co-dependent projects to regularly connect so they can discuss any potential sticking points. For example, there might be an item on the checklist for carpenters and plumbers to meet up at a specific time to discuss their progress on their respective tasks. Maybe a problem has come up with the pipes that affects when the carpenters can get started on their work, but perhaps there’s something the carpenters can do to help the plumbers. The trick is to keep each other in the loop so each respective team can take care of these “known unknowns” as quickly and as effectively as they can. Once the teams talk, they check the communication task as complete, and move on with their work.


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In healthcare, this technique is used in resuscitation procedures. Healthcare workers are trained and recertified, in low and high fidelity simulators, to commence procedures such as Advanced Cardiac Life Support without referring to a checklist. When the patient is not readily revived or responding as expected, the team will refer to their checklists or algorithms to make sure the steps have been executed properly, and that they have not forgotten anything. For this reason, healthcare workers often keep a cognitive aid (a ‘checklist’ of sorts) posted on emergency carts, tucked into pockets or loaded onto mobile devices. ‘Boldface’ checklists can be effective whenever there is a critical sequence to be completed but time is short, or the situation does not enable a physical list to be immediately accessed and used.
And the tragic thing is it’s often the “stupid” simple stuff that gets people killed or keeps them in the hospital for longer than they needed to be. I have an acquaintance who ended up in the hospital for two weeks because he got the wrong heart medicine. The problem was ultimately one of miscommunication — a basic thing you think would be a given, seeing as how hospitals can transplant human faces and whatnot.
If you do not want to exhaust your team members’ creativity, checklists are a must-have tool for production. Their function is simple - to check whether anything is forgotten or unfinished. And the most important thing is that you do not have to create a new checklist every time a task appears. Creative energy can be channeled to the more exacting tasks.
Though Gawande admits he didn't expect to see the checklist make much difference in his own surgeries, he followed it to avoid hypocrisy and was surprised by the results. The checklist saved a life in at least one case, where a mistake by Gawande led to a critical need for blood while the mistake was corrected. Thanks to the checklist, extra blood had been prepared ahead of time, despite Gawande's confidence in performing a surgery he'd done successfully many times before.
To build a proper testing checklist you need to take into account not only the product requirements and user stories, but also cover a wider spectrum of implementation. At the same time, the test scope should be narrow enough to focus on a product’s functionality. It is also important to make separate tests for different parts or elements of activity. For example, a purchase activity on a website may consist of three parts - signing in, adding products to the cart, and signing out. Splitting your checklists for testing procedures will isolate test failures and keep the focus on the essential details.
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