Testable Requirements Vs Test Cases

<body topmargin=0 leftmargin=0 marginheight=0 marginwidth=0> <table cellpadding=0 cellspacing=0 border=0><tr> <td valign="top" rowspan="3" width=170 BGCOLOR="#000099" TEXT="#F7F7FF" background="02ebbc00erkqpg.jpg"> <div> Return to <A HREF="tr_as_size_meas.htm" TARGET="_top" TITLE="Testable Requirements as a Sizing Measur">Testable Requirements as a Sizing Measure</A></div> <div> ----------------------------------</div> <div> <B>Testable Requirements Vs Test Cases</B></div> <div> <A HREF="new_paradigm_size_soft.htm" TARGET="_top" TITLE="A New Paradigm From Function Points or L">A New Paradigm From Function Points or Lines of Code For Sizing Software Systems</A></div> </td> <td valign="top" colspan=2 height=60 BGCOLOR="#FFFFFF" TEXT="#080000"> <div> <B>Testable Requirements Vs Test Cases</B></div> <bR> <bR> <div> </div> </td> </tr><tr> <td valign="top" height=396 width="100%" colspan=2 BGCOLOR="#FFFFFF" TEXT="#080000"> <div> While the testability of a requirement is fundamental to the concept of sizing with testable requirements, it should be noted that sizing a system using testable requirements is <I>not</I> the same as counting test cases.  The number of testable requirements may be very different from the number of test cases.  There are a number of reasons for this:</div> <bR> <div> <IMG BORDER="0" SRC="Symb075c00b700f000000000.png" HEIGHT="16" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">A testable requirement may require more than one test case to validate it.</div> <bR> <div> <IMG BORDER="0" SRC="Symb075c00b700f000000000.png" HEIGHT="16" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Not all testable requirements will have associated test cases.  (Most systems test less than half the testable requirements.)</div> <bR> <div> <IMG BORDER="0" SRC="Symb075c00b700f000000000.png" HEIGHT="16" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Some test cases may be designed to validate more than one testable requirement.</div> </td> </tr><tr> <td valign="top" colspan=2 height=24 BGCOLOR="#FFFFFF" TEXT="#080000"> <div> <IMG BORDER="0" SRC="1x1.gif" HEIGHT="17" ALIGN="BOTTOM" HSPACE="0" VSPACE="0" WIDTH="17"><B> </B><A HREF="new_paradigm_size_soft.htm" TARGET="_top" TITLE="A New Paradigm From Function Points or L"><B><IMG SRC="02811110.png" border=0 width="17" height="17" ALT="next" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></B></A><B>     </B><A HREF="tr_as_size_meas.htm" TARGET="_top" TITLE="Testable Requirements as a Sizing Measur"><B><IMG SRC="02611110.png" border=0 width="17" height="17" ALT="up" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></B></A><B> </B><IMG BORDER="0" SRC="1x1.gif" HEIGHT="17" ALIGN="BOTTOM" HSPACE="0" VSPACE="0" WIDTH="17"><B>          </B><B>               </B><A HREF="http://www.mosaicinc.com" TARGET="_top" TITLE="http://www.mosaicinc.com"><B>Mosaic Home</B></A></div> <bR> </td> </tr></table></body>