My company is on 11.5.10
We have approx 10 yr history

The Company segment of the Accountg Flexfield structure is 3 digits.

We use company values in blocks (ex: companies beginning with JXX - assigned to japan region)

The company range of (001 - 999) has been used.

We are considering code block changes to increase the Company segment from 3 to 5 digits.

Does anyone have any type of documentation of how to design,plan and perofrm this type of procedure?