I work for a company which develops software for airlines. Our product is bought simply because it makes them 1.8% more revenue per year. We could have the grea

I work for a company which develops software for airlines. Our product is bought simply because it makes them 1.8% more revenue per year. We could have the greatest user interface and it wouldn't matter at all. The users are ignored. I've seen customers replace users because they had a hard time to adapt to the interface of the new software. Sad but true.