Answered: Rick Wing, salesperson for Wave…

Practical Management Science

6th Edition

ISBN:9781337406659

Author:WINSTON, Wayne L.

Publisher:WINSTON, Wayne L.

Chapter2: Introduction To Spreadsheet Modeling

Section: Chapter Questions

Problem 20P: Julie James is opening a lemonade stand. She believes the fixed cost per week of running the stand...

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Question

Rick Wing, salesperson for Wave Soldering Systems,
Inc. (WSSI), has provided you with a proposal for improving the
temperature control on your present machine. The machine uses a
hot-air knife to cleanly remove excess solder from printed circuit
boards; this is a great concept, but the hot-air temperature control
lacks reliability. According to Wing, engineers at WSSI have
improved the reliability of the critical temperature controls. The
new system still has the four sensi tive integrated circuits controlling
the temperature, but the new machine has a backup for each.
The four integrated circuits have reliabilities of .90, .92, .94, and
.96. The four backup circuits all have a reliability of .90.
a) What is the reliability of the new temperature controller?
b) If you pay a premium, Wing says he can improve all four of the
backup units to .93. What is the reliability of this option?

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