Plan Start Date: If you have never run the plan, this field displays today's date. If you have run the plan, this field displays the planning horizon start date of the last run.

Plan End Date: Calculated planning horizon end date based on your entries in Buckets and the owning organization calendar.

Start Date: Calculated start date for each bucket based on your entries in Buckets and the owning organization calendar. The value for the Days column is the Plan Start Date.

Buckets: Number of buckets of this bucket type.

Items: Choose to plan at either the Item level or Product Family level. If you select Items in the first bucket, the other buckets can be set to either Items or Product Family. However, if you select Product Family in the first bucket, the remaining buckets are set to Product Family by default.

Resources: Choose to plan at either the Individual level or Aggregate level. If you select Individual in the first bucket, the other buckets can be set to either Individual or Aggregate. If you select Aggregate in the first bucket, the remaining buckets are set to Aggregate by default.

Routings: Choose to plan at either the Routings or BOR level. Whatever level you select in any of the buckets, all the rest of the buckets are assigned that level by default.