Definition
Message functional areas contain groups of time evaluation messages. They enable you to categorize messages and manage message processing.
Use
Time evaluation can generate a large amount of messages. Sometimes the list of messages can be too long to manage. When Customizing the Time Manager’s Workplace, you can group together message types into message functional areas to suit your business requirements. You can structure how the message list is displayed and the messages are processed. Message functional areas can be created using the following criteria:

Message functional areas describing similar business-related situations:
Structure
All message types related to the message types assigned to a functional area are displayed under the corresponding message functional area in the message view. The message view is set up based on whether a processing method is assigned to a message type or a functional area.

In this case, you can display all messages in one functional area or the individual messages. To do so, select a functional area or a message in the message list.
The messages no longer appear in the message view. Always copy the entire message functional area to the message list.
You do not need to assign all of the message types to a message functional area. Some messages require such special processing methods that they can be regarded as special cases. These types are messages to not need to be assigned to a message functional area. These messages are displayed in the message view on the same hierarchy level as the message functional areas.