The use of purchase statuses is mandatory. The purchase status can be changed only by using the Modify purchase status process.

Because of the posting of commitments, you can change a status only to the same status type or higher; an 'Order' type status, for example, cannot be changed to an 'Offer' type status.

Status type	Can be changed to	Status type
Offer		Offer, Order, History
Order		Order, History
History		History

A routing contains the route a file has to follow in Isah.If this field contains a routing, you can click the Routing details button to display the status flow for this routing.

If the Required check box is selected, a purchase line must always follow the status sequence prescribed in the purchase routing.

Note: You can change a routing only if the appropriate rights have been assigned to your user name.

Use this field to purchase parts from a known batch (lot).

Use this field to enter the certificate number specified by the supplier. The certificate number enables suppliers to guarantee the quality of their parts.

Note: Certificates are external codes which a parts supplier has assigned to a parts lot or a single part. Lot numbers are internal codes which you assign to a parts lot.