Loose Coupling

• Change causes less pain.
• Dependencies are known, that they can be managed.
• Change is not too expensive and time consuming.
• Change on both (all) sides can be managed independently of each other.
• Impacts are known and anticipated.

• Can I modify the software to provide the changed functionality?
• Can I modify some parts of the software without having to change all parts? How local can I keep the changes?
• Can I deploy the changes?
• Can I deploy the changes without taking the system down?
• Can I deploy parts of the changes without breaking the system?
• Can I allow users to determine the update schedule so critical business functions are not impacted by the update?