The director of a pharmacy department is interested in benchmarking the level of operations in the unit.The director has definedmedication errors as being anyoneof the following: wrongmedication; wrong dose; administered to the wrong patient; administeredatthewrongtime;

incorrectlyrepeatingthemedication;oromittingthemedication.

Thenumberofordersfilledperdaybythepharmacyvaries.Table8-32showsthenumber ofordersfilledandthenumberofmedicationerrors for25days.Constructanappropriate control chart and comment on the stability of the process.