Taking something that happened and breaking it down into smaller components allows you to really understand the choices you made, what worked, and what didn't go so well. You can then go deeper and look at your strengths and weaknesses in the scenario, where you need to focus on, and the way you could do things better or differently next time. This helps you to prevent repeating past mistakes or unhelpful behaviours.
Change is the only constant in life.’
~Heraclitus, Greek Philosopher