An application developer has created a batch process that leverages an embedded Java SE rule engine to validate some data, calculate some values, and report some recommendations for business users.
Some new calculation changes introduced by the application developer worked perfectly in the development, quality assurance, and staging environments but do not work when run in the production environment. Some of the calculations produce incorrect values. The calculations depend on some external data sources for information which the business users maintain.
The business users know which version of the batch process they are running but the application version and the RuleApp versions have no correlation because of poor application governance. The application developer suspects that the data sources maintained by the business are wrong. The business believes that the new calculations are executing wrong.
In addition to poor deployment governance, the application does not log information about the rules or external data being used. Furthermore, the use of the embedded rule engine does not leverage hot deployment of rules so the application developer is not sure how to determine if the new calculations are being used by the business users.
How can the application developer diagnose the situation?