control limits


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Control Limits

The upper and lower limits on the acceptable level of cash that minimizes the sum of the opportunity cost of excessive cash and the cost of marketable security transactions.

control limits

see CONTROL CHART.
References in periodicals archive ?
The width of control limits is determined by considering the tradeoff between the required type I error rate and expected type II error rate.
This article will discuss a new approach for automated hematology analyzers' daily control limits.
Put another way, the control limits should tell when the process has failed (has gone out of control), but SPC process control limits are designed to prevent the failure in the first place by warning that the system is heading out of control.
A Shewhart chart is defined as "a graphical and analytical tool for monitoring process variation; the natural variation in a process can be quantified using a set of control limits.
Quality control limits for pass/fail can be superimposed on the graph so that the decision to accept or reject product is automatic; no human interpretation is required.
They each took a number of acquisitions of NIST SRM 2460 Standard Bullets and 2461 Standard Cartridge Cases over the course of about a year, and the acquired images were correlated with Golden Images at the National Laboratory Center of ATF, from which control charts and control limits have been developed.
Reference (8) presented modified control limits for maintaining control of a process, when the data were assumed to be dependent and following a second order autoregressive process (AR(2) model).
Repeat strategy Description Rule 1 If all initial QC results are within mean [+ or -] 2s control limits, then accept.
Mean test score targets and attendance proportion targets are set, control limits computed, and class means for exams and attendance proportions are periodically monitored to ensure that processes are "in-control.
A straightforward Pass/Fail notification confirms if the result is within the specified control limits, and the instrument is ready for use.
Upper and lower control limits are typically three standard deviations above and below the center line; if the process is in control, 99.
However, the initial control limits of the in-process predicted surface roughness have to be calculated and obtained firstly based on the actual data in order to use in the I-MR charts for the in-process SPC afterwards.