What is the difference between Master Data and Transaction Data in SAP HCM?

1. Definition:

• Master Data:
  Permanent, relatively static data that defines core entities in the system, such as employees, organizational units, or pay structures.
• Transaction Data:
  Dynamic data that records day-to-day business events or activities related to employees, such as payroll runs, time recordings, or leave requests.

2. Nature of Data:

• Master Data:
  Long-term and rarely changes. Example: Employee personal details, job positions, cost centers.
• Transaction Data:
  Temporary and frequently changes with business processes. Example: Monthly salary, overtime hours, promotions.

3. Examples in SAP HCM:

• Master Data:
  • Employee Infotype 0002 (Personal Data)
  • Employee Infotype 0001 (Organizational Assignment)
  • Pay scale structures, Positions, Departments
• Transaction Data:
  • Payroll results (IT 0008)
  • Time sheets, attendance records
  • Leave or absence records (IT 2001, IT 2002)

4. Purpose:

• Master Data:
  Provides the foundation for HR processes and reporting.
• Transaction Data:
  Captures real-time business transactions to process payroll, benefits, and HR reporting.

5. Dependency:

• Master Data:
  Needed before transaction data can be recorded. For example, you need employee info (master data) before processing payroll (transaction data).
• Transaction Data:
  Depends on master data to execute business operations.

6. Frequency of Update:

• Master Data:
  Updated occasionally (e.g., job change, marital status update).
• Transaction Data:
  Updated regularly (e.g., daily attendance, monthly payroll).

7. System Storage:

• Master Data:
  Stored in infotypes with long validity periods.
• Transaction Data:
  Stored in infotypes with specific periods and linked to events.

Summary:
Master data = static, foundational HR data.
Transaction data = dynamic, event-driven HR data.