Definition of role code

Summary:

Hi All,

What is difference among these roles? Why we need same role with different role code?
Payroll Common HCM Implementation ORA_PAY_COMMON_HCM_IMPLEMENTION_DUTY
Payroll Common HCM Implementation ORA_PAY_COMMON_HCM_IMPLEMENTION_DUTY_CRM
Payroll Common HCM Implementation ORA_PAY_COMMON_HCM_IMPLEMENTION_DUTY_FSCM
Payroll Common HCM Implementation ORA_PAY_COMMON_HCM_IMPLEMENTION_DUTY_OBI

Thanks

Arun

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