The lead time is the period of time between placing a purchase order and receiving the items. While it's likely to differ from order to order, you can set expected lead times on a vendor level in order to predict when goods are likely to be delivered, thus making it easier to plan and forecast.
Vendor lead time (days)
A lead time is set on the vendor record so that any purchase orders created for that individual vendor will be automatically given a delivery date in the future.
Note: Lead times only apply to purchase orders created from the individual who has the lead time set on their contact record. To ensure any purchase orders created by anyone at the company, save the lead time days on each separate contact record (colleague) at a company.
Where the supplier has no lead time set, the default lead time will be used.
Default lead time (days)
The system default number of lead time days is 7 days.
This can be changed at Settings > Purchases > Purchase settings.
Purchase order delivery date
When a purchase order is raised, the delivery date will be calculated as the created date plus the vendor lead time (in days). If the vendor has no lead time days set, the default in purchase settings will be used.
The delivery date can also be manually set on a purchase order at any time.