We hired a Parts / job Estimator approx 3 years ago - Nice thing it keeps estimates consistent , they can stay on top of who has what , pricing changes , new products available ,Stock needs , They learn how to to communicate with tech's for specific facts needed to find parts , They learn warranty's so we get the best warranty for dollars spent , They know time lines for parts , and can have all electronic look ups , Google , Etc. , Communicate with Tech's what part really works and or not - Aftermarket or OE , or TSB.
The Tech's turn their sheets into S/A's they then prioritize what needs sold and or can be by knowing clients better , then that goes to Parts / Job Estimator .
We sell a lot of Big job's so it would hamper S/a's to do this and they do not stay consistent , they let emotions buy parts and who is their friend at part store not what normally best interest for shop or customer.
In closing - The savings in parts cost alone should pay for their salary .