This is an extension module for Workflow-ng that provides an action that lets users perform operations on individual profile fields.
The module is extremely flexible, allowing any kind of MySQL operation to be performed (token-compatible) on any profile field, for any user that can be derived from token.
The original intent for development was to create an attendance/class-card system in Ubercart. This module provides the functionality to add X number of classes to a user's "class card" profile field when they purchase a 5, 10 or 20 class card.
To implement the attendance system with class-card tracking using Ubercart, see this thread.