Quantitative Survey.

Questions that provide numbers as result. Quick and inexpensive way of measuring user satisfaction and collecting feedback about the product. It could indicate the need for a deeper qualitative test.

Better User Research Through SurveysUX MasteryNovember 20th, 2014
Five critical quantitative UX conceptsMeasuring USeptember 25th, 2012
Strengths and Weaknesses of Quantitative and Qualitative ResearchUX MattersSeptember 3rd, 2012
Ten Guidelines for Quantitative Measurement of UXUX MagazineApril 22nd, 2011
7 aspects of successful usability questionnairesSteve BromleyNovember 11th, 2009