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 sensitive integrated circuits controlling the​ temperature, but the new machine has a backup for each. The four integrated circuits have reliabilities of 0.840.84​, 0.860.86​, 0.880.88​, and 0.900.90. The four backup circuits all have a reliability of 0.840.84. Part 2 ​a) The overall reliability of the new temperature controller​ = 92.2592.25​% ​(enter your response as a percentage rounded to two decimal​ places). Part 3 ​b) If you pay a​ premium, Wing says he can improve all four of the backup units to 0.870.87. The overall reliability of the new temperature controller with the upgraded backup unit​ = 92.25% enter your response here​% ​(enter your response as a percentage rounded to two decimal​ places).

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ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
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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 sensitive integrated circuits controlling the​ temperature, but the new machine has a backup for each. The four integrated circuits have reliabilities of
0.840.84​,
0.860.86​,
0.880.88​,
and
0.900.90.
The four backup circuits all have a reliability of
0.840.84.
Part 2
​a) The overall reliability of the new temperature controller​ =
92.2592.25​%
​(enter your response as a percentage rounded to two decimal​ places).
Part 3
​b) If you pay a​ premium, Wing says he can improve all four of the backup units to
0.870.87.
The overall reliability of the new temperature controller with the upgraded backup unit​ = 92.25%
enter your response here​%
​(enter your response as a percentage rounded to two decimal​ places).
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