I had a brief dance with a customer who could have benefited from FAS and its ties to Sage 100 for maintenance costs, etc. It never went far enough to have any significant experience with it. It would be worth your while to talk somebody at the Sage FAS group for details to evaluate.
IMO OM/JobOps would be overkill. It has a nice facility to handle maintenance & service on products, but it's oriented around service contracts, and invoicing customers. The customer would have to have a very painful situation to solve for before I'd consider this.
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Jerry Norman
At-Large BOD Member, 90 Minds
Smartbridge Partners
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