From ETO to CTO in machine manufacturing: how ERP enables flexibility and standardization

Machine manufacturers are under pressure to meet two competing demands: customers expect ever-shorter lead times, while customization and customer-specific solutions remain important. In a traditional engineer-to-order (ETO) environment, balancing these demands can put increasing pressure on the organization. Engineering becomes overloaded, lead times become unpredictable, and growth becomes difficult to manage or may even stagnate.

That is why more and more machine manufacturers are moving toward configure-to-order (CTO). Not to eliminate customization, but to manage variation more intelligently. Isah ERP software can play a central role in this transition.

The practical limitations of engineer-to-order

At many machine manufacturers, every order starts with engineering from scratch, even when the machine is largely similar to previous projects. Examples include production lines, handling systems, or packaging machines, where variations may include:

• Capacity or speed

• Dimensions

• Choice of drives, control systems, or safety options

• Integration with other machines and systems in a production line

For medium-sized machine manufacturers, this often means that knowledge is concentrated among just a few experienced engineers. For larger organizations, the main challenges tend to arise in handoffs between sales, engineering, and production preparation. The result is the same: long lead times, errors in bills of materials, and extensive coordination.

Configure-to-order: standardizing to stay flexible

For machines that can be built using a modular approach, configure-to-order can serve as a practical alternative or complement to ETO. The principle is simple: machines are built from standardized modules and options that can be combined according to predefined rules. The result is a customer-specific product built from standardized modules, without having to engineer every order from scratch.
For machine manufacturers, this could mean:

• One base machine with expandable modules

• Predefined option packages for motors or control systems

• Customer-specific options without having to redesign the machine

In this way, CTO helps speed up processes while maintaining flexibility, provided it is properly supported.

ERP as the foundation for CTO

The transition from ETO to CTO requires structure. Isah ERP supports machine manufacturers in this transition by helping them manage product variation in a structured way.

Define variants and make them repeatable

In practice, many machine manufacturers already use established solutions, but that knowledge is scattered across the organization, either held by individual engineers or stored in separate documents. In Isah, variants, options, and dependencies are centrally defined.

For example:

• A fixed machine platform with configurable options

• Clear rules defining which combinations are permitted

• Sales configurations that are technically correct from the start

For medium-sized machine manufacturers, this reduces dependence on specific individuals. For larger organizations, it prevents differences in interpretation between departments.

Automated bills of materials: from configuration to the shop floor

In an ETO environment, bills of materials are often created and modified separately for each project. With CTO in Isah, bills of materials are automatically generated based on the selected configuration.

This results in:

• Less manual work in production preparation

• Consistent information for purchasing and production

• Fewer errors and less rework on the shop floor

Engineering, production preparation, and production all work from a single source of truth, creating greater clarity and predictability.

More reliable delivery times

Because configuration, bills of materials, planning, and material availability come together in Isah, organizations gain a realistic view of whether orders can be produced as planned. Lead times not only become shorter but also more reliable.

Common misconceptions about CTO

Configure-to-order is sometimes seen as rigid or complex. In practice:

• You do not have to define everything in advance. Start where there is the most repetition.
• CTO is particularly well suited to high-mix, low-volume machine manufacturing.
• Standardization reduces the workload for engineering and speeds up customization.

Conclusion: standardization as an accelerator

By standardizing intelligently, machine manufacturers create more room for innovation and growth. Isah ERP supports this by bringing structure to product variation without sacrificing flexibility. In this way, standardization does not limit customization. Instead, it makes customization more efficient while creating a more scalable way of working.