EBK PRODUCTION AND OPERATIONS ANALYSIS
7th Edition
ISBN: 8220102480681
Author: Olsen
Publisher: WAVELAND
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Question
Chapter 13.7, Problem 30P
Summary Introduction
Interpretation:
The optimal time for replacement:
Concept Introduction:
The objective of optimal policy is to determine the value of 't’ that minimizes the total cost of maintenance and replacement over an infinite horizon.
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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
0.84
0.86
0.88
and
0.90
The four backup circuits all have a reliability of
0.84
Part 2
a) The overall reliability of the new temperature controller =
enter your response here%
(enter your response as a percentage rounded to two decimal places).
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.…
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 0.82, 0.84, 0.86, and 0.88. The four backup circuits all have a reliability of
0.82.
a) The overall reliability of the new temperature controller =% (enter your response as a percentage rounded to
two decimal places).
1. If you pay a premium, Wing says he can improve all four of the backup units to
0.91. the overall reliability of the new temperature controller with the…
Chapter 13 Solutions
EBK PRODUCTION AND OPERATIONS ANALYSIS
Ch. 13.1 - Prob. 3PCh. 13.1 - Prob. 4PCh. 13.1 - Prob. 5PCh. 13.1 - Prob. 6PCh. 13.2 - Prob. 7PCh. 13.2 - Prob. 9PCh. 13.3 - Prob. 13PCh. 13.3 - Prob. 14PCh. 13.4 - Prob. 15PCh. 13.4 - Prob. 16P
Ch. 13.4 - Prob. 17PCh. 13.4 - Prob. 18PCh. 13.4 - Prob. 19PCh. 13.4 - Prob. 20PCh. 13.6 - Prob. 21PCh. 13.6 - Prob. 22PCh. 13.6 - Prob. 23PCh. 13.6 - Prob. 24PCh. 13.6 - Prob. 25PCh. 13.7 - Prob. 26PCh. 13.7 - Prob. 27PCh. 13.7 - Prob. 28PCh. 13.7 - Prob. 30PCh. 13.7 - Prob. 31PCh. 13.7 - Prob. 32PCh. 13.7 - Prob. 33PCh. 13.7 - Prob. 34PCh. 13.8 - Prob. 35PCh. 13.8 - Prob. 36PCh. 13.8 - Prob. 37PCh. 13.8 - Prob. 38PCh. 13.8 - Prob. 39PCh. 13.8 - Prob. 40PCh. 13.8 - Prob. 41PCh. 13 - Prob. 42APCh. 13 - Prob. 43APCh. 13 - Prob. 44APCh. 13 - Prob. 45APCh. 13 - Prob. 46APCh. 13 - Prob. 48APCh. 13 - Prob. 49APCh. 13 - Prob. 51APCh. 13 - Prob. 52APCh. 13 - Prob. 53AP
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