The use of purchase statuses is mandatory for purchase lines for parts. The purchase status can be changed only by using the Change 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.