Delta kitting with product groups

Introduction

In manufacturing, product groups in delta kitting are used to organize, control, and validate materials required for configurable or variable assemblies. Delta kitting focuses on supplying only the differences or deltas between a base kit and a specific product variant, rather than issuing a completely unique kit for every build. In advanced manufacturing, delta kitting combined with product groups enables high product variability while maintaining lean inventory and efficient production flow.

What is delta kitting?

Delta kitting is a material management strategy where:

• A common base kit contains parts shared across multiple product configurations

• Additional parts or substitutions are issued only for the specific differences required by a particular product build

This approach is common in the following environments:

• Electronics manufacturing

• Aerospace and defense

• Medical device manufacturing

• High-mix/low-volume production

• Configure-to-order environments

What are product groups?

A product group is a logical collection of products, assemblies, or configurations that share the following:

• Common components

• Similar manufacturing processes

• Similar routing/workflows

• Variant rules or options

Product groups are typically defined by:

• Product family

• Customer configuration

• Regional variants

• Feature options

• Engineering revision structures

Examples

• PCB assemblies with optional communication modules

• Military radios with country-specific encryption options

• Industrial machines with voltage-region variants

• Automotive trim packages

• Custom wood cabinets with optional hardware and paint colors

How product groups are used in delta kitting

Define the common base kit

The product group establishes which components are common across all products in the family.

Example: Product group Control Panel Series V has the following common components that make up the base kit:

• Main PCB

• Chassis

• Power supply

• Standard fasteners

Identify variant-specific delta components

Within a product group, each configuration only receives the additional or replacement materials needed for that variant. Instead of separate full kits, the base kit is only issued once and delta materials are added dynamically.

Reduce kit duplication

Without product groups, every product may require a completely unique kit. With product groups, shared materials are standardized and only the differences (deltas) are managed separately. Some benfits of delta kitting with product groups:

• Fewer BOMs

• Lower inventory duplication

• Reduced planning complexity

• Easier engineering maintenance

Support for Engineering change management

Product groups help simplify change management. For example, instead of updating 50 individual product kits, Engineering only updates the shared product group structure or a specific delta rule. This approach reduces configuration errors and inventory risk, for example:

• Replace capacitor across all variants in a family

• Update one common group definition

Improve material staging and line feeding

With delta kitting and product groups, warehouse and production teams can stage common materials in bulk and small delta kits per order. This is highly effective for mixed-model assembly lines, lean manufacturing, and just-in-time operations.

Example:

• 90% identical assembly

• Only 10% differs per customer order

Operators receive:

• Standard base materials

• Small labeled delta package

This reduces:

• Line-side inventory

• Picking time

• Human error

Support for serialized and configure-to-order manufacturing

In highly regulated industries such as Aerospace, Medical, and Defense, product groups help associate:

• Serial numbers

• Lot-controlled materials

• Compliance requirements

• Customer-specific options

Delta kits can then be generated:

• Per unit

• Per batch

• Per work order

• Per serialized assembly

Example: PCB assembly

The result of the following product group with delta kitting is one common manufacturing flow, many configurable products, and minimal inventory duplication.

Benefits of using product groups in delta kitting