ERP stands for Enterprise Resource Planning and refers to centralised business software that maps a company's key business processes in a coherent system. This typically includes merchandise management and warehousing, purchasing, sales, financial accounting, production and often also human resources. The aim of an ERP system is to connect these areas on a common database so that information is only recorded once and used consistently throughout the company.
Why companies use an ERP
Without a centralised system, companies often maintain the same data multiple times in separate stand-alone solutions: Inventory in one spreadsheet, invoices in another software, customer master data in yet another place. This leads to duplication of work, inconsistencies and errors. An ERP creates a common truth: an order, a stock or a customer data record exists exactly once and is currently available for all relevant departments. This makes processes faster, more traceable and easier to plan.
Widespread ERP systems
Different systems are widespread in the SME and enterprise environment, including SAP (such as SAP Business One or S/4HANA), Microsoft Dynamics, Sage and abas, as well as numerous industry-specific solutions, some of which have been developed in-house. The systems differ greatly in terms of scope, flexibility and the quality of their interfaces. The interfaces in particular are often the decisive factor when interacting with other systems.
ERP and e-commerce
The connection between ERP and web shop is particularly important for retailers. Stocks, prices, orders, customer and invoice data must flow reliably between the two systems. If this connection is weak or only runs via nightly imports, the result is outdated stock, overselling and manual rework. A clean, preferably event-based ERP webshop integration ensures that stock changes reach the shop immediately and incoming orders end up in the ERP without manual typing.
The question of the leading source
With every ERP integration, it must be clarified early on which system is the leading source for which data object. "Both" is not a viable answer, because otherwise contradictory statuses will result depending on the order of the write processes. It is common and proven practice for stock and price to come from the ERP, while customer and order data is created in the shop and flows from there into the ERP. This clear division prevents conflicts and keeps the data consistent.
Architecture of an ERP connection
Robust integrations do not link the ERP and shop directly at database level, but via a dedicated integration layer with clear adapters for each system. This translates between the data models and decouples the systems from each other so that an ERP update, for example, does not immediately jeopardise the shop. Lightweight message brokers or the webhook mechanisms of modern platforms such as Shopware 6 are often used. This creates a maintainable connection that remains stable even as volumes grow.
ERP as the foundation of digitalisation
A well-integrated ERP is often the foundation of other digitalisation projects. Customer portals, automated quotation generation or document management rely on ERP data and only realise their benefits if this data is clean and up-to-date. If you want to digitalise processes, you should therefore check early on how accessible and reliable the data in your own ERP is - it is often the lever on which many subsequent projects depend.