Use the information from fred flow soldering process

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Reference no: EM132297352

Use the information from Fred’s flow soldering process that solders chips onto a board that goes into his cell phones (see the earlier questions). The average range in thickness of the soldered surface from each sample of sixteen boards has been .5 microns.

Using the R-chart for Fred’s flow soldering process described above and assuming the following series of ranges were observed over an 11-hour period:

.612 .543 .555 .576 .611 .632

.645 .698 .506 .555 .467

Is the process under control? If not, why not?

Reference no: EM132297352

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