Date Specifications (Info type 0041).  The following information is recorded in the Date Specifications info type (0041). The Date type specifies the type of information.  A concrete Date type (specified by the user) is used in a series of reports, for example to evaluate an entry date that cannot be derived from the organizational assignment history but which is stored in the Date Specifications info type (0041).   This info type can be used in payroll as well as for the leave program.  The standard system contains twelve combinations of Date type and Date. If the requirement is more than twelve date specifications for an employee at the same time, then the time constraint 3 is used.

There are four types of reports:

1. SAP standard query.
2. HIS can start HIS from any plan versions.
3. Adhoc (in other modules known as Info set) can access data fm all HR areas by choosing selection and output fields. Selection made directly from the database. Std. authorization checks take place at the info type & org assignment levels.
4. ABAP query.

Variant is to save all input field parameters. Once you saved as a variant, you can use the same for future purposes

Multiple positions can be created by LSMW or batch programs for the Transaction Code PP01 or PPOCE.