Boundary value analysis

Question

Why does the boundary value analysis provide good test cases?

Satyapriya Nayak · Answer

Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 Boundary value testing is a technique to find whether the application is accepting the expected range of values and rejecting the values which falls out of range. Exmple A user ID text box has to accept alphabet characters ( a-z ) with length of 4 to 10 characters. BVA is done like this max value: 10 pass; max-1: 9 pass; max+1=11 fail ;min=4 pass;min+1=5 pass;min-1=3 fail; Like wise we check the corner values and come out with a conclusion whether the application is accepting correct range of values. http://en.wikipedia.org/wiki/Boundary-value_analysis /* Style Definitions */ table.MsoNormalTable{mso-style-name:Table Normal;mso-tstyle-rowband-size:0;mso-tstyle-colband-size:0;mso-style-noshow:yes;mso-style-priority:99;mso-style-qformat:yes;mso-style-parent:;mso-padding-alt:0in 5.4pt 0in 5.4pt;mso-para-margin:0in;mso-para-margin-bottom:.0001pt;mso-pagination:widow-orphan;font-size:11.0pt;font-family:Calibrisans-serif;mso-ascii-font-family:Calibri;mso-ascii-theme-font:minor-latin;mso-fareast-font-family:Times New Roman;mso-fareast-theme-font:minor-fareast;mso-hansi-font-family:Calibri;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Times New Roman;mso-bidi-theme-font:minor-bidi;}