Pay special attention to importing the following replenishment parameters:

• Lead time
• Order cycle
• Min lot
• Max lot
• Rounding
• Lead time variance

These characteristics depend on the echelon the planning item resides at. If a planning item is sourced from a DC, these parameters define the replenishment process from that DC. In this case:

• Lead time – the average time interval to deliver an item from DC to the location at the lower echelon.
• Lead time variance – the variance of the Lead time defined above.
• Order cycle – how often you replenish from DC.
• Min lot, Max lot, and Rounding – the constraints that are put on an item when you order it from DC.

If a planning item is sourced from a supplier:

• Lead time – the average time interval to deliver an item by your supplier.
• Lead time variance – the variance of the supplier Lead time.
• Order cycle – how often you send purchase orders to the supplier.
• Min lot, Max lot, and Rounding – the constraints that are put on an item when you order it from the supplier.

If your supply chain is described by a two-echelon model and there is a shelf life limitation on an item at the lower echelon, you should also provide a shelf life for the DC that supplies that item. DC's shelf life must then safisfy the condition:

where:

• Lead time – the time to deliver the item from the DC to the location at the lower echelon.
• Shelf life – the shelf life limitation at the lower echelon.

If the Supplier code is not given, Streamline attaches those items to an empty supplier code.