The Joint Commission on Accreditation of Healthcare Organizations (JCAHO) requires an accounting of significant medication errors. Data collected over the last 25 months, shown in Table 8-26, indicate the number of orders filled and the number of significant medication errors. Each order is classified either as having or as not having significant medication errors.
(a) Construct an appropriate control chart and comment on the process.
(b) If the process is not in control, assuming special causes and appropriate remedial actions, revise the centerline and control limits.
(c) What is your level of expectation from this process?
(d) What would you do if the goal is to reduce the proportion of significant medication errors to 1%. Is this currently achievable?
TABLE 8-26

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Orders Significant Errors Orders Significant Errors Sample Sample 120 150 140 12 10 12 12 10 14