Just use the manager screen for all jobs instead of /r in the workshops
Necroing this particular point to make a counter-point that for all I know has already been raised... Manager-tasked jobs can't (currently?) be fine tuned equivalent to doing something like assigning just your super-skilled expert(s) to one particular workshop where "Make Trade_Product (R)" is active and assigning all relevant non-experts to another workshop of that type where "Make Subsistence_Product [x7]" is the order of the day...
Or, if not actually prejudiced for/against individual dwarfs working on any particular job, ensure that (frexample) your order for statues is being accomplished in the workshop that you have previously surrounded with the pigmented stone of choice in the hope that you won't suffer too much collateral stone statues when the dwarf that gets assigned to the job starts off from in the midst of another stone...
But if you have to use the Job Manager, you can't even guarantee that the whole set of statues (or gloves or whatever) is sparked off within the right workshop without micromanaging in some way (suspending jobs that appear in the wrong place, to later cancel in the hope that they pop up on the 'right' workshop's list next time round).
But this is a problem probably many times mentioned (and maybe even with an answer that I haven't yet discovered).
But I do like the whole "Construct Wooden Beds (7) has been completed." information, so do get the Manager to help me with that sort of thing when I'm not being an utter control-freak. (Although then I frequently end up grumbling when the manager decides to wander off and attend to his or her own needs or one of their 'moonlighting jobs', instead...)