What is the difference between Progressive Enhancement and Graceful Degradation?

Question

I\'m confused on what the difference is between Progressive Enhancement and Graceful Degradation. To me they seem like the same thing.

Answer 1

The direction from a chosen baseline for each concept is different.

Graceful Degradation starts at a ideal user experience level and decreases depending on user agent capabilities down to a minimum level, catering for agents that don't support certain features used by the baseline.

Progressive Enhancement starts at a broad minimum user experience and increases depending on user agent capabilities up to a more capable level, catering for agents that support more advanced features than the baseline.

I think that one could employ both concepts if time/budget permit. If not then graceful degradation would be preferred.