# Configurable BOM

> Source: https://netray.co/glossary/configurable-bom
> Publisher: Netray (netray.co), AI and integration engineering for ERP and manufacturing systems.
> Section: Glossary

## Short answer

A configurable BOM is a bill of materials generated or adjusted from the options a customer selects, so that one product family with many possible variants does not need a separate stored BOM for every combination.

## Aliases

- variant BOM
- option-based BOM
- modular BOM
- product configurator BOM

## Category

manufacturing

## Full Definition

Configure-to-order products, such as machines, enclosures, vehicles and custom equipment, can have thousands of valid combinations. Storing every combination as a BOM is unmanageable. A configurable BOM stores a base structure plus option groups and rules: if option X is selected, add these components and remove those.

Two common designs exist. A modular or planning BOM groups the choices into option families with percentage splits for forecasting. A variant or generated BOM creates a customer-specific BOM and routing when the order is entered, which then flows to MRP and the shop floor like any other.

ERP capability varies widely. Infor LN includes a product configurator for engineer-to-order and configure-to-order. SyteLine supports configurators with rule-based BOM and routing generation and can use the Product Configurator module. NetSuite and others typically need an add-on configurator. Without a configurator, teams often use phantom BOMs and kits as a lightweight approach.

Rule quality is the main risk. Missing constraints allow invalid combinations that cannot be built, and engineering has to fix the order after it has been promised.

## Why It Matters

- It avoids maintaining thousands of near-duplicate BOMs and routings.
- Quotes and delivery dates get faster and more consistent when rules enforce valid combinations.
- Forecasting by option share supports building common modules ahead of orders.
- Cost accuracy requires that every option carries its own components and operations.

## In Practice

A control panel family has 4 enclosure sizes, 3 voltage ratings and 6 optional modules. That is far more than 70 combinations by count, yet only about 25 components differ. A configurator creates the order-specific BOM from selections, and rejects a 24V module on a size 1 enclosure that physically cannot fit it.

## Faq

### What is the difference between a configurable BOM and a standard BOM?

**Answer:** A standard BOM is fixed. A configurable BOM changes based on selected options, usually through rules or a configurator.

### What is a planning BOM?

**Answer:** A BOM that groups options with forecast percentages so MRP can plan common modules before exact orders arrive.

### Do I need a configurator for this?

**Answer:** Not for a handful of variants. Phantoms and option items may be enough. A configurator pays off once combinations number in the hundreds.

## Search terms

configurable BOM, variant BOM, configure to order BOM, modular BOM, product configurator ERP, planning BOM

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