process control chart


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process control chart

[′prä‚səs kən‚trōl ‚chärt]
(industrial engineering)
A tabulated graphical arrangement of test results and other pertinent data for each production assembly unit, arranged in chronological sequence for the entire assembly.
References in periodicals archive ?
The cycle-counting procedure will itself indicate when the desired level of record accuracy has been achieved through either a T-test or a review of the process control chart. This method is particularly apt when both a cycle-counting programme and an error-reduction programme are undertaken simultaneously.
Process control charts could then be developed which not only compare overall performance with the standard but also look more closely at individual performances as Ott and Schilling[3] have suggested.
Process control charts will provide early warning of deteriorating accuracy levels through their ability to reveal trends as they occur.
Process control charts are therefore equally applicable to service and manufacturing organizations.
Using statistical process control charts can be very helpful in analyzing time series data and pointing to the actual occurrences of variation and limits of the current process (see Figure 1).
Process control charts (also referred to as Shewhart charts) are graphical and analytical tools for deciding whether a process is in a state of statistical quality control.
"For every process we have defined the critical control points, and we use statistical process control charts to track control points and identify when they are drifting out of control; we solve the problems immediately.
The software, operating on an Apple Macintosh computer, generates process control charts, histograms, pareto analysis, scatter diagrams, attributes analysis, and gage-repeatability and reproducibility studies.
Typically, this involves establishing numerous process control charts to monitor status of production processes.
* The major objective of process control charts is to obtain a quick feedback on the process status and in most cases the time lag due to sample inspection (en) is very small.
Process control charts have been used as a statistical process control (SPC) tool for: establishing the capability of the process given by its variance; and monitoring the process for any shift during operations.
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