How to setup two levels of approval for purchase orders?

Purchase Management

Purchase
Supplier Pricelist
- How to search for product based on supplier code or name on purchase order?
Purchase Exception
- How to buy from new supplier with drop ship policy, when you default supplier reject the order?
- How to cancel confirmed purchase order or confirmed purchase order received partial shipment?
Vendor Bills
- Call for Tenders | Odoo Purchase
- How to control vendor bills, pay vendor bills based on reception?
Purchase Agreement
- How to manage bulk purchase through tender process?
- How to purchase partially at two vendors for the same purchase tenders?
Inventory Costing
- Compute the cost of product (average costing)
- Compute the cost of product (first in first out method)