Product Groups
Learn about Product Groups in Marlin GTX trusted automotive software by Megabus.
Updated 12 October 2026
GTX enables products to be categorised into product groups for classification, reporting and pricing.
Product Reporting Levels:
- Product Departments: Highest-level summary of stock sales
- Product Supergroups: Broad groupings such as manufacturer
- Product Groups: Categories of products within a department
- Individual Products: Detailed reporting for a single product
Product groups define how products are grouped for reporting and inventory.
Product supergroups sit above product groups and provide broader categorisation.
Each product group belongs to a department and can include defaults for reporting and pricing.
>Markup Sets can be assigned at the product group level for consistent pricing rules.
Note — Product groups are mandatory and must be assigned to every product.
Product Supergroups
Product supergroups define higher-level categories that product groups belong to.
They are typically aligned to business areas such as tyres, accessories, labour charges or other sales categories.
Each product group must be assigned to a product supergroup.
Product supergroups can be viewed and edited by selecting System > System Files > Products > Product Supergroups from the menu bar.
Adding Product Supergroups
System > System Files > Products > Product Supergroups
New product supergroups can be added by clicking on the {{glossary.Add}} button at the top of the Supergroup Maintenance window.
The Add Supergroup window will open.
In the Details tab:
- Enter a unique Code and Name
- Select a Department
- (Optional) Select a Markup Set
- Click {{glossary.Save}} (top of module)
Warning — Product supergroup codes cannot be changed once they are added.
Assigning Product Groups to Supergroups
System > System Files > Products > Product Groups
Each product group must be linked to a product supergroup.
Product groups can be assigned to a supergroup using the Product Supergroup picker in the product group's Details tab.
Note — Supergroups must exist before product groups can be added.
Product Groups
Product groups can be viewed and edited by selecting System > System Files > Products > Product Groups from the menu bar.
Adding Product Groups
System > System Files > Products > Product Groups
New product groups can be added by clicking on the {{glossary.Add}} button at the top of the Product Groups window.
The Add Product Group window will open.
In the Details tab:
- Enter a unique Code and Name
- Select a Supergroup
- (Optional) Select a Markup Set
- (Optional) Select a Gross Profit Cap Level
- Click {{glossary.Save}} (top of module)
Warning — Product group codes cannot be changed once they are added.
Assigning Products to Product Groups
Products > Add Product
Products can be assigned to product groups using the Product Group picker in the Details tab of their Product Maintenance file.
To assign a product group:
- Open the product in {{glossary.Edit}} mode
- Use the Product Group lookup to select the group
- Complete all other required details
- Click {{glossary.Save}} (top of module)
Tip — Assigning the correct product group ensures that pricing, reporting and categorisation are consistent across the program.