As a model-based control algorithm, the performance of controller will be hard to be improved only by re-tuning the parameters of controller if there is serious mismatch between model and plant.

Always re-evaluate tuning parameters and physical organization of the database before moving it to a different system, even when the systems are on the same kind of platform.

Tuning is largely about understanding how things work, determining if they're working properly, making adjustments, and re-evaluating.