TABLE 17-7 A Supplier of Silicone Sheets for Producers of Computer Chips

question 89

Short Answer

TABLE 17-7
A supplier of silicone sheets for producers of computer chips wants to evaluate her manufacturing process.She takes samples of size 5 from each day's output and counts the number of blemishes on each silicone sheet.The results from 20 days of such evaluations are presented below.
-Referring to Table 17-7,an chart is to be used for the number of blemishes.One way to obtain the control limits is to take the grand mean and add and subtract the product of A₂ times the mean of the sample ranges.For this data set,the value of A₂ is ________.

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Definitions:

Pegging

In material requirements planning systems, tracing upward in the bill of material from the component to the parent item.

Part Requirement

Specification or quantity of a component necessary for completing a manufacturing process or assembling a final product.

Parent Component

In manufacturing or software development, a main component that includes or is linked to subordinate components within a product or system.

Safety Stock

Inventory kept on hand as a buffer against variability in demand or supply, ensuring that out-of-stock situations are minimized.