What do the Requests statuses mean?

Draft: Requests available for editing (action that will be performed by users with Requester permission level);

Pending Approval: Request pending approval (action that will be performed by users with permission level Approver);

Returned: Request returned by Approver (and available for editions);

Waiting ERP: Awaiting ERP validation (a company's external system, used at some stage of the supply chain and integrated with Nimbi), to continue the approval flow;

Approved: Approver has already accepted;

Cancelled: Request canceled (action that will be performed by users with Buyer and/or Approver permission level).