Configure to Order vs Engineer to Order
Configure to Order (CTO) builds products from predefined options, no new engineering per order. Engineer to Order (ETO) designs a custom product for each order. CTO is fast and rule-driven; ETO is bespoke and engineering-intensive. Here's how they differ and where a configurator fits.
CTO vs ETO at a Glance
Where a Configurator Fits
Configuration software helps both models, differently
For Configure to Order
A configurator enforces valid option combinations and produces pricing and bills of materials instantly, enabling true self-service product building with zero engineering touch.
For Engineer to Order
A configurator captures requirements and automates the repeatable parts of design, shrinking custom-engineering scope to only what's genuinely unique. Heavy equipment example
Frequently asked questions
Configure to Order (CTO) builds a product by combining predefined, standardized options and modules, no new engineering is required per order. Engineer to Order (ETO) involves designing or engineering a custom product for each order, often with new drawings and specifications. CTO is faster and rule-driven; ETO is more bespoke and engineering-intensive.
A laptop or industrial machine where the customer selects from set options, processor, capacity, color, mounting, and the final product is assembled from existing, pre-engineered components. Every valid combination is already known and buildable.
For Configure to Order, a configurator enforces valid option combinations and generates pricing and BOMs instantly. For Engineer to Order, a configurator captures requirements, automates the repeatable portions of design, and reduces engineering involvement by handling rules-based configuration up front, shrinking the custom-engineering scope to only what is truly unique.
Streamline CTO or ETO Quoting
See how Ignitionary handles both standardized and engineered orders