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Context and Level 1 DFDs
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Example: Recall Again Our Payroll Problem
Employee employee_data payroll_parameters Proposed Hourly Payroll System Hourly Employees hours_worked Corporate Payroll System weekly_ payroll_ summary weekly_check weekly_payroll_report Plant Manager Proposed or new Existing Processes/DB People/entities/Roles © The KTP Company, 2005
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Payroll System Level 1 Diagram
Employee DB payrate_parameters Corporate Payroll System employee_data Hourly Employees ded_parameters Compute Gross Pay 2 gross_pay hours_worked hrs_emp-data Compute Deductions 3 Match Hours & Emp_Data 1 weekly_payroll_summary ded_data deductions Create Reports 7 Prepare Check Data 4 weekly_check Print Check 5 payroll_data weekly_payroll_report Tabulate Summaries 6 check_data Plant Manager Payroll System Level 1 Diagram © The KTP Company, 2005
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