Excessive dependence of checklists may hinder performance when dealing with a time-critical situation, for example a medical emergency or an in-flight emergency. Checklists should not be used as a replacement for common sense. Intensive training including rote-learning of checklists can help integrate use of checklists with more adaptive and flexible problem solving techniques.[citation needed]

First, from the product page, the Add to Cart button should be highly visible. Next, the shopping cart should be easy to locate—usually positioned in the sidebar, or the top-right. The checkout page should be super-easy to access, and never more than one click away, allowing a visitor to bypass the shopping cart if they want. Finally, the checkout fields should be logical, and kept to a minimum.
A checklist is a type of job aid used to reduce failure by compensating for potential limits of human memory and attention. It helps to ensure consistency and completeness in carrying out a task. A basic example is the "to do list". A more advanced checklist would be a schedule, which lays out tasks to be done according to time of day or other factors. A primary task in checklist is documentation of the task and auditing against the documentation.
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