The Functional Independence Measure (FIM) is a tool that helps people who are dealing with injuries or disabilities to see how well they can do certain things by themselves. It works by giving them a score based on how well they can do everyday tasks, like brushing their teeth or getting dressed. The FIM considers 18 different tasks, including things like eating, bathing, and toileting. The scores help doctors and therapists to understand how much help a person might need with certain tasks and what they can improve on. Think of it like a big report card that helps people see what they can do well and what they need to work on, so they can get back to doing things on their own.