A checklist is a list of items or tasks that you "check off" as you complete each item/task on the list. Checklists are everywhere and are an integral part of most activities - both personal and business. In our own daily lives, we make checklists for organizing, planning (birthday party), prioritizing (bills to pay), shopping (grocery list), and so forth. Business is no different; checklists are essential to an effective, efficient, and profitable operation.
What would happen if each salesperson processed an order differently? Or there was no budget? Or you did not know what was in inventory? Or what items were already on order? Or who was scheduled to work the evening shift? This not only would be chaotic, it is simply not good business. Checklists are essential to the successful operation of a business.