Determine the Revised Central Line for a Count of Nonconformities

question 12

Short Answer

Determine the revised central line for a count of nonconformities chart. Assume any out-of-control points have assignable causes. Data not shown are in control. The trial central line is 0.80, the trial UCL is 2.00, and the trial LCL is 0. $$\begin{array} { c c c c } \begin{array} { c } \text { Lot } \\\text { Number }\end{array} & \begin{array} { c } \text { Sample } \\\text { Size }\end{array} & \begin{array} { c } \text { Count of } \\\text { Nonconformities }\end{array} & \begin{array} { c } \text { Count of non- } \\\text { conformities/unit }\end{array} \\55 & 5 & 2 & 0.40 \\56 & 5 & 5 & 1.00 \\57 & 5 & 11 & 2.20 \\& & & \\78 & 5 & 3 & 0.60 \\79 & 5 & 0 & 0.00 \\80 & 5 & 4 & 0.80\\\square=25 & \square=15 & \square=100\end{array}$$

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Definitions:

Leak

The accidental escape of a fluid or gas through a hole or crack, or the disclosure of confidential information.

Plumbing

The system of pipes, drains, fittings, valves, and fixtures installed for the distribution of water for drinking, heating, and washing, and the removal of waterborne wastes.

Piano

A musical instrument with keys that, when pressed, operate hammers that strike wires to produce sound.

Necessary Condition

A condition that must be present for an event or entity to occur or exist; without it, the event or entity cannot occur or exist.