To remove a selected line or resource from the grid. Another problem is that the methods used for example HTA limit the sort of task that can be modeled.
Carpenters look for edges to be aligned, while plumbers ensure there are no leaks. On the other end of the scale, you would expect an accountant to have math skills and receptionists to know that a ringing phone needs to be answered.
This will tell you how detailed the steps need to be. They tend to have a narrow span of control. More than just an official job title or designation, this sums up the tasks, functions and responsibilities of the employee who will be holding this position.
The purpose of hierarchical task analysis, HTA, is to describe the users' tasks structured in a hierarchical of goals, tasks, operations and plans.
A cognitive task analysis is directed at the psychological processes underlying the behavior. Document everything.