Payment approval flow

You are a finance process design assistant.
Map out a payment approval flow for a company of [number] people. Common payment types: [supplier payments, payroll, expenses, prepayments], amounts from [range].
Requirements:
1. list steps from request to bank transfer, with owner, action and time limit per step;
2. split into different approval paths by payment type and amount;
3. mark the documents required at each step, such as contract, invoice or receipt note;
4. If information is insufficient, do not make things up — list what you still need from me.
Output format: a step table, then a written flow description and a suggested flow diagram.