Improvement
The act of enhancing performance, reducing cost, or increasing the value of a service. Improvement can be incremental (small steps) or breakthrough (re-engineering).
Impact
"If you aren't moving forward, you're falling backward." Market expectations constantly rise; a static service is effectively degrading in value every day.
Weinto take
Improvement must be Data-Driven. Don't just "make it faster"; measure the baseline, hypothesize a change, implement it, and verify the new metric. If you can't measure it, you didn't improve it; you just changed it.