Solution : https://service.sap.com/sap/support/notes/1246420 (SAP Service marketplace login required)
Summary : 
      This SAP note provides guidance on the Cross Application Time Sheet (CATS) including functionalities and transaction codes. Details cover both functional and customizing transaction codes such as CAT2, CAT7, CAC1, etc. It also advises attending the CA500 standard course updated as of October 2008, aligned with ERP 6.0 enhancements and extended to three days. Links to external resources and literature like "Integrating CATS (2nd Edition)" and "Configuring and Using CATS" offer further insights into setup and technical configurations. Additional documentation, although not exhaustive, is available online for more comprehensive support on CATS functionalities.
Key words : 
cats_appr_lite       approve working timescats_da              display working timescats_selview         maintain selection view hrcatscatsarch             archiving time sheet datacatswf               cats workflowcatsxc              customizing, profile authorization groupscac5                 define customer fieldscac6                 allowed print reportscac7                number range maintenance, approve datacat5                data transfer cats -> pscat6                transfer external -> time managemencat7                cats, time recordingcatr                reorganize interface tablescats_appr            approve working times, /downloads/manuel%20gallardo%20sample%20cats%20user%20exit%20code, document displaycat9                data transfer cats -> pm/cscata                transfer, /printdocu/core/print46c/en/data/pdf/cats/cats, cheat sheet transaction codes transaction codes, catscac8                number range maintenance, /saphelp_erp60_sp/helpdata/en/64/400b2b470211d189720000e8322d00/frameset
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| 171491 | Attendances: Proposal and limitation | 
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| 155282 | CO docs for confirmations: Correction programs | 
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