Sentence:  On the other hand , even when the binomial model does not describe <WSD>well</WSD> the physical phenomenon being studied , the binomial model may still be used as a baseline for comparative purposes ; that is , we may discuss the phenomenon in terms of its departures from the binomial model . 
Meaning of the word marked with <WSD> tags:  (often used as a combining form) in a good or proper or satisfactory manner or to a high standard (`good' is a nonstandard dialectal variant for `well')