Answer
A usable audit trail captures more than a timestamp. It should show the before and after state of a schedule definition, the user profile that made the change, whether the change went through any approval step, and enough context to answer why the change happened, not just that it happened. Teams running regulated processes, credit card settlement, financial close, or trading partner commitments, often need this evidence to satisfy SOX, PCI, or customer audit requests, and reconstructing it after the fact from job logs and QSYSOPR history alone is slow and incomplete.
Buyers should ask whether change history is tamper-evident and whether it survives independent of the person who made the change, since a log an administrator can quietly edit is not a real audit trail. It is also worth asking how long execution history is retained by default and whether that retention is configurable, because a six-month window is not enough when a customer disputes a shipment or a chargeback claim points back to a batch process from a year earlier.
Finally, ask whether schedule changes in production require any review step at all. Software that lets any authorized user silently alter a critical dependency chain removes exactly the accountability an audit trail is supposed to provide.