First, I would like to thank so much for your information.
1. Normal, the transit time from HaiPhong Port to Laem chabang is 17-19 days by sea.
As your email: transit time of lots at the and of year 2014 was over month, I have just received from our forwarder's confirm, this lots shipped in Lunal new year time in VietNam, so that they had some problem when finish export document. And this problem will be never ever repeat.
Next time, I will send for you the shipment schedule (date of ETD and ETA).
2. About PO leadtime:
On contract showed: the Purchser shall submit the purchas order that is in the form designed by the Pur to the Seller on the date agreed upon in advance or 60 days before Estimate Time Delivery (ETD).
And I think PO lead time is 30-40 days, that is the best.
3. Information of forecast
It is very necessary for us to prepare material and production plan. Please let us know information of forecast from 6 month to 1 year of all part if you have.