Make to order: how to plan delivery dates

Home » Resources » Make to order: how to plan delivery dates

Estimated reading time: 9 minutes

Make to order (MTO) is a production approach in which manufacturing starts after a customer order arrives. Instead of shipping a finished product from stock, the manufacturer makes it for that order. The customer therefore waits for production as well as delivery.

For a production planner, the challenge is turning the requested delivery date into a realistic plan. Having the materials on hand is not enough if the work must pass through resources already committed to other orders. Before promising a date, check the whole route through production and the effect on existing commitments.

What is make to order?

In make-to-order production, a customer order triggers manufacturing. The product may already be designed, and its production steps may already be defined. MTO does not require every order to be a new engineering project or a unique product.

It also does not mean the factory has no inventory. Raw materials, purchased components and work in progress can all be held in stock. The distinction is that the finished product is made for an order rather than produced in advance to await a buyer.

Think of the order as the reason to manufacture, not proof that manufacturing can start immediately. Materials may still need to arrive, and the necessary workstations may already be occupied. The order needs a place in the production schedule.

Make to order vs make to stock, assemble to order and engineer to order

These approaches differ in how much work is completed before the customer orders and what remains in the customer’s waiting time.

Approach	Before the customer order	What the order triggers	What the customer waits for
Make to order (MTO)	Product design and production preparation may already exist; materials or components may be stocked	Manufacturing for the order	Material availability where needed, production and delivery
Make to stock (MTS)	Finished products are manufactured for anticipated demand	Allocation and dispatch of a stocked product	Fulfilment and delivery if stock is available
Assemble to order (ATO)	Components or modules are prepared and stocked	Final assembly for the selected configuration	Assembly and delivery, plus any missing components
Engineer to order (ETO)	General capabilities or design elements may exist	Substantial order-specific engineering as well as manufacturing	Engineering, procurement, production and delivery

The boundaries are not always rigid. An MTO product may need a small design change without becoming a full ETO project. A manufacturer can also use different approaches for different product families.

A job shop is a different concept. It describes how varied jobs move through shared resources. Make to order describes the relationship between the customer order and the start of manufacturing. A job shop can make products to order, but the two terms are not synonyms.

Benefits and trade-offs of make-to-order production

MTO can reduce the risk of holding finished product variants that customers do not buy. It also allows production to follow the actual order rather than relying entirely on a forecast of the finished-product mix.

The trade-off is that the customer waits while manufacturing takes place. A finished-goods buffer cannot absorb a delay in the same way it can when the required MTS product is already stocked. Material availability, resource load and the arrival of other orders all matter to the promised date.

Order volumes and product mixes can vary, so yesterday’s lead time is not automatically a reliable estimate for today’s order. MTO is not inherently cheaper, and it does not eliminate inventory costs. Its suitability depends partly on how much variety customers need and how long they can wait.

How to plan a delivery date before releasing the order

Separate the customer’s requested date from the date the current production plan can support. Then work through the following checks before releasing the job or confirming the commercial delivery promise.

1. Confirm what must be made

Check the product, quantity, configuration and required production steps. Resolve missing specifications before treating the order as ready for scheduling. Record the requested delivery date, but do not use it as evidence that the work fits.

A change in quantity or configuration can change the work needed. Plan the actual order, not a similar job’s remembered lead time.

2. Check materials and purchased components

Identify what is available and what must be purchased or replenished. For missing items, check when they are expected to be usable at the relevant production step. An order should not appear able to start simply because a purchase order has been placed.

Distinguish confirmed availability from an assumption that still needs checking. If a critical arrival date is uncertain, make that uncertainty visible before committing to the customer.

3. Check the route and available resources

Confirm the sequence of operations, eligible workstations, shifts and working times. Include setup work where it affects the schedule. Each operation needs both its preceding work and its required resources to be available.

A free workstation at the beginning of the route does not establish a completion date. The job may still wait for a shared resource farther downstream.

4. Fit the job into the existing workload

Place the order alongside work already scheduled, including the load on any bottleneck. Do not estimate its completion as though the factory were empty.

For a hypothetical example, the material for a new order is ready and its first operation has space. However, the shared finishing resource is committed to another order. Starting the new job immediately does not remove that finishing queue. The delivery estimate must account for it.

5. Check completion and delivery separately

Review when the entire production route can finish, not just the first or last operation in isolation. Then account for any separate inspection, packing, dispatch or transport work needed for that order.

A factory completion date and a customer arrival date are different milestones. Confirm which one the customer expects before communicating a delivery promise.

6. Decide what to change if the requested date does not fit

The planner may need to change the priority, consider an available alternative resource or discuss a different delivery date. Check the effect on other orders before committing to a change. Moving one urgent job forward can move another customer’s job back.

The useful output is a feasible production plan, a clear view of remaining uncertainties and an informed delivery decision. A requested date alone is none of these.

What changes when a rush order or delay arrives?

A rush order, a late material delivery or a change in capacity can affect several orders sharing the same resources. Recheck the affected production routes rather than moving only one final operation on the schedule.

Start with what changed. If a material is late, identify which operations depend on it. If capacity is unavailable, check the work assigned to that resource and the consequences for later steps. For a rush order, decide its priority and inspect which existing commitments it displaces.

The planner decides priorities; AI scheduling follows those decisions. An updated schedule helps show the consequences, but a changed customer promise still needs to be handled as a business decision. Keep the production plan and communicated delivery commitments aligned as conditions change.

How SkyPlanner supports make-to-order scheduling

SkyPlanner APS produces a production schedule from orders, process steps and available resources. Its AI scheduling engine, Arcturus, assigns work to workstations while taking material availability, shifts, priorities and delivery dates into account. The Gantt timeline shows the resulting plan so the planner can see how jobs share capacity.

SkyPlanner integrates with any ERP or MES system through its open REST API. Orders, materials and production data can connect the existing business system with scheduling. SkyPlanner does not replace the ERP, and integration through the API should not be confused with a prebuilt native connector for every system.

When Autopilot is enabled, SkyPlanner can update the schedule as new orders arrive, completions are recorded or capacity changes. Planners retain control through priorities and locks. Producing a schedule is not the same as automatically confirming a delivery promise to the customer.

To evaluate how the schedule handles competing orders, Start your free trial. Explore the product with demo data or use the AI-assisted Getting Started path in SkyPlanner Assistant. Focus on whether the plan makes material dependencies, shared-resource load and the consequences of your priorities clear.

Frequently asked questions

What does make to order mean?

Make to order means manufacturing starts after a customer order arrives. The finished product is made for that order rather than shipped from a stock of products manufactured in advance.

Does make to order mean there is no inventory?

No. An MTO manufacturer can hold materials, components and work in progress. The main distinction concerns finished products: they are manufactured for customer orders rather than stocked in anticipation of those orders.

What is the difference between make to order and make to stock?

MTO starts manufacturing in response to an order, so the customer waits for production. MTS manufactures finished products ahead of orders, allowing fulfilment from stock when the required product is available.

Is make to order the same as engineer to order?

No. ETO includes substantial engineering for the individual order before or alongside manufacturing. MTO can use an existing product design, although smaller order-specific changes are possible.

Is make to order the same as a job shop?

No. MTO describes when manufacturing starts in relation to the customer order. A job shop describes the flow of varied jobs through shared resources. A factory can use both, but they describe different aspects of production.

How do you plan a delivery date for a make-to-order job?

Check material availability, the sequence of operations, eligible resources and their existing workload. Review completion of the whole production route, then account separately for dispatch and transport. If priorities change, check the effect on other orders before promising the date.

Can SkyPlanner work with our existing ERP?

Yes. SkyPlanner integrates with any ERP or MES system through its open REST API. The connection needs to be implemented for the relevant system and data flow; this does not mean every ERP has the same ready-made native connector.