Thanks Grover,

I understand the workflow now.

Now that I've confirmed the Purchase Order I can't see the options to print or email the PO.

Was able to print

So please mark answer as correct to help others

but he is right you can not send confirmed Purchase order with email from openerp.how to fix it?

So, if I understand correctly you can email an RFQ from OpenErp but you cannot email a Purchase Order. That's strange.

The button "send Email" disappears after confirmation of the order. But feel free to change the way it works and make the buttons stay if you need to. You have all the tools you need to do. If you don't want to do on your own you will find partners all around the world will help you. I could change it with 5-6 clicks in the view or with only editing one line in the source code. The workflow you find is just a draft. You can use it the way it is or alter it to make it fit to your requirements.