Each person can have a purchasing limit. An order over it goes to the people who approve that kind of order, and the last approver sends the PO.
A foreman can buy a $200 hose without asking anyone. A $9,000 final drive needs the equipment manager's yes. Approvals let each person send what they may, and route the rest to the right approver before the PO leaves, with no email chain.
Purchasing limits. An account admin sets each person's limit in Settings → Users ("Purchasing limit in dollars (blank for no limit)"). Blank is no limit: that person may send an order of any amount. A person whose limit covers the order total sends the PO alone.
Who approves. Each person's What they manage words in Users say what they look after, for example "approves orders over $2,500 for the Civil business unit". Gearflow reads those words into approval rules, and an admin confirms each rule. Only a confirmed rule names an approver ("Not counted until confirmed").
The approval chain. An order over the selector's limit goes up a chain of levels, lowest amount first. Every person on a level approves before the order moves up. The last person on the last level sends the PO. A person who selects an order and is in its chain counts as their own level's approval. With no confirmed rule for an order, the selector picks one approver (Pick who approves).
The approvers each get an approval task. "No approver is set up for this order. Ask an admin." means no rule and no person covers it.
The approver opens the order from their task.
The order's timeline records each ask, approval and send-back.
Who sees it. Account admins, except on accounts whose ERP names the approvers for each job.
The page is read-only: rules change only where the words are, in Users.
Gearflow sets this up for some accounts connected to an ERP. These accounts keep their own approval rules, and Settings shows no Approvals page for them.