Use this window to define new lead time categories and other attributes which are relevant in DDMRP. A range of a cumulative unprotected lead time of a part type belongs to a specific Lead Time Category ID. Such a category will also have specific green and red lead time factors, rolling time horizons and average daily usages as well. Part is assigned to a lead time category after performing the lead time category classification. Buffer zones of buffered part will be calculated based on these attributes.