Where is the most optimal place to edit journals?

We have journals that can be entered online, through the staging table JGEN and CI's that store the journals directly to the journal tables.

Often, the business reports issues that fields are missing edits. We think some of these are related to Project Costing accounting entries.

Is there a best practice for a central strategy to perform edits when journals are created from multiple door ways?

Thanks in advance for the feedback.