Standards:FOLLOWING a good standard consistently will benefit a project in the long run. These standards include naming conventions, environmental settings, documentation, parameter files, etc.
Re-usability:REUSABLE transformations enable you to react quickly to potential changes. You should use Informatica components like mapplets, worklets, and transformations.
Scalability: While designing, it is IMPORTANT to consider scalability. The VOLUME must be correct when developing MAPPINGS.
Simplicity: Different mappings are always better than one complex mapping. A simple and logical design process is ultimately more important than a complex one.
Modularity: Utilize modular techniques in designing.