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Processing of Functions 
The RPTIME01 report does not process all functions using the framework of personnel assignments. You therefore have to include only particular functions in the business rules.
Whether Time Evaluation for Concurrent Employment uses the framework of business subjects to process the functions depends on the properties and type of the functions. Only functions that are used to generate wage types, time balances, message types, or attendance/absence quotas are relevant for processing using the framework of business subjects.

The GWT function (Generate Wage Types from Time Pairs) outputs wage types, the LIMIT function (Value Limits for Time Balances) outputs time balances, wage types, and message types, and the QUOTA function outputs absence quotas. The functions can therefore be processed in the framework of business subjects and you can process personnel assignments jointly.
Many functions import data or set groupings. They do not output any of the aforementioned data. The following functions, for example, are not processed using the framework of business subjects because the employee’s working times have to be imported and stored temporarily for each personnel assignment so that they can be processed further:
· P2000 (Import Daily Work Schedule/Create Time Pairs from Daily WS)
· P2011 (Provide Time Pairs and Daily WS)
· ...
You do not need to include functions that cannot be processed using the framework of business subjects in the business rules.
If time evaluation for concurrent employment calls a function that generates output data, it determines all the business subjects to which the output data is assigned. The system calls the framework of business subjects for each of the business subjects determined. It processes all business rules that are assigned to the selected business subjects and that are relevant for the employee and his or her personnel assignments.

If the output data is assigned to a business subject, but no step of the business rule is found for the corresponding personnel assignment groupings, processing is terminated with an error at this point.
If a wage type, time type, and so on is not assigned to a business subject, the system processes the output data for each personnel assignment separately.
Note: Output data that you generate in final processing must not be assigned to a business subject.
the system processes the data of the relevant personnel assignments jointly only if you specify in the business rule that the function is to be processed jointly.
Processing of Time Evaluation for Concurrent Employment has been adjusted for the relevant functions and operations so that the functions can process more than one personnel assignment jointly.

§ For information about which functions have been released for processing using the framework of business subjects, see the SAP Note 516489.
§ If you have written customer-specific functions and operations that output time balances, wage types, message types, or attendance/absence quotas, you cannot use them for Time Evaluation for Concurrent Employment at this time.
The framework of business subjects processes table-driven functions such as GWT (Generate Wage Types from Time Pairs) entirely differently to functions that execute personnel calculation rules such as ACTIO (Rule-Controlled Performance of an Action):
· Table-driven functions
The framework picks out all table entries that are valid for the organizational assignments or groupings of the personnel assignments currently being processed and that you have specified in the Customizing settings for business rules.
· Functions that execute personnel calculation rules
The framework first analyzes which business subjects have the personnel calculation rules specified and makes the business subjects it determines available for processing.
You also have to assign the output data that is generated in the PC rule, by ADDZL or ADDDB for example, to the business subjects.
See also:
For more information, see the Implementation Guide for Personnel Time Management and chooseTime Evaluation ® Concurrent Employment in Time Evaluation ® Business Rules of Time Evaluation ® Assign Steps to Business Rules.
