Frequency distribution reports

Frequency distribution reports can be optioned for all the parameters in the system collector (see Figure 1). Actually, the distribution reports for almost all collected parameters can be obtained by placing the DISTRIBUTION keyword in the option field of any option card.
Figure 1. Frequency distribution report
CREATED ENTRIES PER SECOND                               BSS   SUBSYSTEM           31 MAR        11:11:03     SYSTEM     PAGE    22


        12 OBSERVATIONS              MIN =       11.746               VARIANCE          =        2.000
                                     MAX =       17.164               STANDARD DEVIATION=        1.414
                                     MEAN=       13.306               COEF. OF VARIATION=        0.106

   CLASS        FREQUENCY           PERCENTAGES             MULTIPLE       STD. NORM.        FREQUENCY DIAGRAM--SCALE=        1 /1
UPPER LIMIT     OBSERVED       CLASS    ACCUM   REMAIN      OF MEAN         DEVIATE
       12.03        2        16.66         16.6     83.3      0.90        -0.90            .XX
       12.31        1         8.33         24.9     75.0      0.92        -0.69            .X
       12.60        1         8.33         33.3     66.6      0.94        -0.49            .X
       12.89        3        25.00         58.3     41.6      0.96        -0.29            .XXX
       13.17        2        16.66         74.9     25.0      0.99        -0.09            .XX
       13.46        0         0.00         74.9     25.0      1.01         0.11            .
       13.74        0         0.00         74.9     25.0      1.03         0.31            .
       14.03        1         8.33         83.3     16.6      1.05         0.51            .X
       14.32        0         0.00         83.3     16.6      1.07         0.71            .
       14.60        0         0.00         83.3     16.6      1.09         0.91            .
       14.89        0         0.00         83.3     16.6      1.11         1.12            .
       15.17        0         0.00         83.3     16.6      1.14         1.32            .
       15.46        0         0.00         83.3     16.6      1.16         1.52            .
       15.75        0         0.00         83.3     16.6      1.18         1.72            .
       16.03        1         8.33         91.6      8.3      1.20         1.93            .X
       16.32        0         0.00         91.6      8.3      1.22         2.13            .
       16.60        0         0.00         91.6      8.3      1.24         2.33            .
       16.89        0         0.00         91.6      8.3      1.26         2.53            .
       17.18        1         8.33         99.9      0.0      1.29         2.73            .X
       17.46        0         0.00         99.9      0.0      1.31         2.94            .

These distribution reports are used to investigate any unusual data such as extreme maximum or minimum values found in the summary. Wide variances indicate that the processing flow through the system is not smooth. Examination of the class limits and observed frequencies can verify that the system is experiencing wide swings in either input or utilization of one or more of its resources. When such a situation occurs, use caution when comparing one variable to another in order to distinguish cause from effect. Peaks occurring in one variable usually impact some other resource later in the processing cycle. Note that these reports are concerned with frequency distribution only; no chronology of samples is set up.