We said, ???Suppose a peer review is done on a program comprising
8,000 lines of code, and 8 errors are found. Another peer review is done on a
program comprising 8 lines of code, and 6 errors are found. The second peer review
found fewer errors. Does that mean that the person who coded the second program
is a better coder than the person who coded the first program? Of course not. You
also need to consider the complexity of the programs, the length of the programs,
the type of language, and so forth.??? A u-chart is sometimes used for just this example
because it takes into consideration the size of the program reviewed. However,
we still do not recommend using a u-chart in this case. It is too easy to misinterpret
the results and too easy to use the wrong data to construct the charts.
OK, so if this all sounds too complicated, and you don??™t like the idea of your
limits changing with each observation, then just go ahead and use the XmR chart
256 n Interpreting the CMMI
with your count-based data. The XmR chart??™s behavior will resemble the c-chart
and the u-chart, since these are special cases of the individuals chart.
Pages:
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544