Draft Generation
After Manager Sign-off

Data Entry
Timesheet & Expenses

Prepayment
Entry?

Prepayment Validation
Balance Check

Invoice Draft Generation
is_generated = 0

Deallocate
Records

MANAGER Approval
Sign-off
PO Validation

Cancel Invoice
(Manager)

COORDINATOR Final Approval
is_generated = 1
Invoice Number

Cancel Invoice
(Coordinator)

BILLED Status
Final Invoice

Prepayment
Balance Check

Draft Invoice
DraftInvoice_No

Billed Status
Invoice_Charge

Validation
Business Rules

Cancellation
Reverse Process

TimeSheet Entry
Hours & Rate

Expense Entry
NetAmount

PO Validation
Amount Check

Deallocation
Un-invoice

MANAGER
• Initial invoice approval
• PO limit validation
• Rate card verification
• Can cancel draft invoices

COORDINATOR
• Final invoice approval
• Assigns invoice numbers
• Finalizes billing status
• Can cancel final invoices

PREPAYMENT FLOW
• Validates available balance
• Links to prepayment invoices
• Tracks utilization
• Updates remaining amounts