Using the Laney p’ Control Chart for Monitoring COVID-19 Cases in Jordan

Table 1

Sensitizing rules [63].

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Rule

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One or more points outside of the control limits

Two of three consecutive points outside the two-sigma warning limits but still inside the control limits

Six points in a row steadily increasing or decreasing

Four of five consecutive points beyond the one-sigma limits

A run of eight consecutive points on one side of the centerline

Fifteen points in a row in zone C (both above and below the centerline)

Fourteen points in a row, alternating up and down

Eight points in a row on both sides of the centerline with none in zone C

An unusual or nonrandom pattern in the data

One or more points near a warning or control limit

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