In the military, a sniper firing a high-velocity bullet over vast distances requires precision & concentration.
There are many factors trying to pull that bullet off its intended course. Wind speed, distance to target, humidity levels, elevation and countless other factors. Having a well thought out plan and a very clear target will provide the best information possible for a successful outcome.
It is the same in selling. As a professional salesperson, you need a plan to look over all the outcomes and provide a process for navigating every obstacle you can uncover.
Just like a sniper, you too need a clear target and a well thought out plan to meet that target.