Seeking clarification re NCE and NCI

In the agile activities table, for the NCE and NCI fields, once a value has been submitted, the values are baselined and cannot be changed without a revise investment option. But at least the NCE field accepts fractions so a case can be made that at least the NCE field should not be baselined and the ITDB should accept updates as fractions of an epic are completed. Please advise if the intent behind base lining these fields is similar to the other "actual" fields (completed date, cost, etc) and OMB/ITDB expects the NCE and NCI fields to be updated only after all fractions of the epic have been completed.

Thank you.
Joe Gomes
USDA OCIO IRM CPTGD