Some people use the term planning and scheduling but when you find out what they actually do, they are assigning technicians or crews to work and not planning at all, and certainly not scheduling.
You can assign work without planning it, but it is better to assign work after you have planned it.
When it comes to scheduling, setting a date when work is due to start without taking into account whether all the work you have scheduled is feasible against the resource availability is really just creating a plan, it is not scheduling. You must plan your work before you can schedule it.
This presentation will describe a 12-step method towards planning and scheduling maturity, it is written from a Maximo perspective, and will be useful to any customer that has purchased the Maximo Scheduler.