Order category determines the application component to which an order belongs. It is usually used as a program-internal selection criterion and to all intents and purposes does not appear to users.

Setting Up an Order Type
Parameters for order type:
Settlement profile:
Specifies possible settlement recipients, the default receiver, and additional parameters (for example, allocation structure).
Budget profile (optional):
Summarizes the budgeting control parameters (time frame, display, availability checks, currency conversion).
Residence time:
Residence time 1: Specifies the period of time (in calendar months) that must elapse between when the deletion flag is set (step 1) and when the deletion indicator is set (step 2).
Residence time 2: Specifies the period of time (in calendar months) that must elapse between when the deletion indicator is set (step 2) and the reorganization (step 3).
Screen for reference object:
Specifies which input masks should be used for the reference object.
Number range:
Specifies which number range interval is used for each order type.
Planning plant:
Assigns order types to the maintenance planning plant.
Costing variants: actual + planned:
Contains control parameters for planned and actual costs in the order.
Settlement rule:
Defines the start time for creating the settlement rule.
Maintenance activity type:
Subdivides tasks within an order type and serves evaluation purposes (inspection, routine maintenance, preventive maintenance, refurbishment, cleaning, and so on).
Not to be confused with CO activities, which are assigned to the cost center and enable work valuation during operation.
Planning indicator:
Performs selection and statistical evaluation in the plant maintenance and customer service information systems (planned, unplanned, immediate orders).
Scheduling parameters:
Contain parameters such as the scheduling type and requirement date for materials. For details see lesson Scheduling.

The maintenance activity type is the key for the type of maintenance activity executed (repair, shutdown, periodic tasks, and so on).
In cost evaluations (total costs, number of orders per technical object), you can classify the data using the maintenance activity type (distinction made between maintenance activities and costs).
The permitted activity types are assigned to each order type.