Bom vs adding parts in the job

Hi Everybody,
New to Epicor.
The question is is it better to use boms for the material when building the job, or just add material.
What is the pros and cons
Thanks

If you plan to make it more than once, then Yes using a BOM is worth it.

If you are not making it more than once how are you quoting/engineering/planning for consumption/purchasing non-stock components?

Instead of using a part BOM created with Engineering toolbox all the material is specified in the job material
Just more tedious as I only know how to add one piece at at time