Health care facilities must conform to certain standards in submitting bills to Medicare/Medicaid for processing. The number of bills with errors and the number sampled are shown in Table 8-25. Construct an appropriate control chart and comment on the performance of the billing department. Revise the control limits, if necessary, assuming special causes for out-of-control points. Comment on the capability of the department.

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TABLE 8-25 Bills with Number Bills with Number Observation 1 Errors Sampled Observation Errors Sampled 8 400 14 3 300 10 11 12 13 5745674 23456789D23 6 400 15 5 300 4 400 16 8 300 9 400 17 11 500 7 400 18 13 500 5 400 19 300 20 300 21 300 22 15 300 23 300 24 300 25 8784376 500 500 500 500 500 500 500 300