Period Units in Updating: Plant Maintenance Information System 
Period Units in Updating: Plant Maintenance Information System
In addition to the type of update, you can also define the period units for the updating process.
The period unit specifies the intervals at which the statistical data is cumulated. You can choose from the following:
You can define a period unit for every standard information structure.
The information structures S061, S062, S063 and S070 are updated on a monthly basis in the Plant Maintenance Information System. The information structure S065 (Object statistics) does not have a period unit. The period unit of updating for the information structures which contain the cost key figures should not be changed.
The prerequisite for changing the period unit is that no actual data has been updated to the information structure.
You can set the period unit for the standard information structures in Customizing for the Logistics Information System.