Library /sys$common/syshlp/pca$help.hlb Coverage Analysis  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    PCA's coverage analysis consists of two parts: gathering and
    analyzing the data. To gather the data, use the SET COVERAGE
    command. A typical command might be SET COVERAGE PROGRAM BY LINE.
    This would set a coverage point on every executable line in the
    program. For more information see SET COVERAGE.

    To analyze coverage information, you must use the /COVERAGE
    qualifier with the PLOT or TABULATE command. To view those
    portions of the program that are not covered, use the
    /NONCOVERAGE qualifier. For more information about histograms and
    tables see PLOT or TABULATE. Please also refer to the Acceptable_
    Noncoverage HELP entry, describing how acceptable non-coverage
    (ANC) information is specified and used in PCA.