In practice, three places are where issues most commonly arise. First is "trying to go live without organizing data first"—product codes aren't standardized, prices are scattered across individual salespeople's Excel sheets, customer data isn't centralized. If these issues aren't sorted out before implementation, no matter how good the system is, you're just digitalizing the existing mess. Second is "starting configuration without process consensus"—especially from quotation through order to shipment, each salesperson has different habits and management has different rules. Before implementation, you need to confirm what your company's own process is; you can't let the system decide the sequence for you. Third is "only one person knows how to use it"—the system is implemented led by IT or management, but the salespeople and shipping staff who actually operate it aren't trained together, so in the end only one person uses it and everyone else keeps using email. None of these three problems are technical issues; they're all preparation work that should happen before implementation.