it’s important to start testing it to see if the assumptions you have made are correct. Any testing you can do — no matter how informal — will serve you well.
The goal is to gather as much feedback as you possibly can as early as you possibly can. This helps you to identify any design issues before you get to the expensive part of the process when you reach the final build. It’s too late — and too expensive — to leave user testing until after you’ve built your product. At that point in the process, changes are incredibly costly.
Usability Testing Goals
Identify if users are able to complete specific tasks successfully
Establish how efficiently users can undertake predetermined tasks
Identify changes required to improve user performance and satisfaction
Identify how long it takes to complete specified tasks
Find out how satisfied participants are with your Web site or other product
Analyse the performance to see if it meets your usability objectives
Develop a solid test plan that outlines your usability test, ensuring that when you test across different individuals, you’re doing so in a consistent manner
The scope of the test must be clear in order to avoid getting too much data in areas and field you might not need.
Focus on what you want to test.
Narrow the Audiance
Establish clear criteria for recruiting participants, so that you’re testing users who are appropriate to what you’re designing.
Make sure that testers have the right equipment to be able to take the test . Make sure they have the right devices and conditions to run the test.
Make sure the test last long enough to pull the results you are looking for, but not too long to bore the tester and get useless data. 40-60 minutes is the optimal time frame.
Create a guideline to follow when you run a test. This ensures consistency and focus, and guarantees similar data.
Try to keep and store the tests you run. You might need to read/watch again the test in case you missed something. Make sure testers give you the rights and authorisation to record the test.
Make them Comfortable
You are testing the product, not the tester. Try to make this clear otherwise the tester might feel under judgment and the response might be not genuine or realistic.
Be Flat and Neutral
Fight the natural need to express opinions, dont make suggestions or give clues. Testers must not be influenced by your behaviour.