Definition

A Form-Fit-Function (FFF) class is a grouping of fully interchangeable products that are identical in all of their technically relevant properties (form, fit, and function).

Use

Different products with the same properties (form, fit, and function) but produced by different manufacturers are grouped together as fully interchangeable products within a common class of interchangeable products – a form-fit-function class. FFF classes do not have validity dates.

Structure

The header data of every FFF class contains an additional indicator Restricted Interchangeability Allowed. You use this indicator to specify whether or not the FFF class can participate in a restricted interchangeability group .

The item data of every FFF class consists of products that have the same technically relevant properties. They are not location-specific.

For planning purposes you have to create FFF subsets that are location-specific as shown in the figure below.

Each FFF subset has a leading product. Only this product can be ordered. You must create at least one FFF subset for each FFF class.

For more information about header and item data, see Interchangeability Group Types .

FFF subsets are also known as Manufacturer Part Number MRP Sets in some industries.

Integration

FFF classes are supported by the following applications: