Loading the player...

# Use Youtube player (with Youtube AD) #<<<>>> # Use our player (Downlaod, Unblock & No Youtube AD) 再生できないときはここをクリック　click hrer if failed to load 如无法播放请点击这里#

INFO:
Nobody has enough user-research budget to test everything, so you must focus usability testing on those features that will matter the most for the user experience and have the most business impact. Here's a simple method to prioritize what to test.
You Can't Test Everything, So What Should You Test? (Video) - NN/g