Use this window to create history records of all part eco-footprint emission calculations. This is useful in keeping a record of all the calculations performed, and makes it possible to do appraisals over time. It is recommended to create eco-footprint history records on regular basis for parts with very long lifecycles, since the characteristic for the part could be changed several times during its lifecycle. You can also use this dialog box to make the calculation an automated recurrent event. The calculation is performed as a background job.