IIE Transactions
1573-9724
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Negotiating price/delivery date in a stochastic manufacturing environment
Tập 31 - Trang 255-270 - 1999
We study a make-to-order manufacturing system consisting of several processing
centers that are subject to failures and repairs. Our objective is to build a
model that can be used as a tool for negotiating the delivery date and the price
of a certain upcoming order. The model takes into account the congestion level
of the shop floor at the time the order is placed. Based on the workload of the
pro...
Optimal asymmetric tolerance design
Tập 32 - Trang 1127-1137 - 2000
An asymmetric tolerance design occurs when deviation (from the ideal target) of
a quality characteristic in one direction is more harmful than in the opposite
direction. Asymmetric tolerances are common in many manufacturing processes.
Traditionally, the designer of a manufactured component either would choose the
smaller tolerance as the tolerance for both sides of the ideal target, or would
set ...
Assessing multivariate process/product yield via discrete point approximation
- 1998
The assessment of multivariate yield is central to the robust design of
products/processes. Currently, yield is evaluated via Monte Carlo simulation.
However, it requires thousands of replications per simulation to achieve an
acceptably precise estimate of yield, this is often tedious and time consuming,
thereby rendering it unattractive as an evaluation tool. We propose a discrete
point approxima...
Allocation of test times in multi-state systems for reliability growth testing
- 2002
This paper generalizes a reliability growth test allocation problem to
series–parallel multi-state systems. An algorithm, which determines the testing
time for each system element in order to maximize the entire system reliability
when total testing resources are limited, is suggested. The algorithm can handle
both repairable and non-repairable multi-state systems. The Crow/AMSAA
reliability growt...
Scheduling one and two-processor tasks on two parallel processors
Tập 31 - Trang 445-455 - 1999
In this paper we study a two-processor scheduling problem where some tasks need
to be processed by one processor, while the others have to be processed by both
processors simultaneously. The objective is to minimize the total weighted
completion time. We first examine the complexity of the problem, showing that it
is NP-complete in the strong sense. We then derive optimality properties, and
presen...
A methodology for quantifying the effects of product development on cost and time
Tập 31 - Trang 365-378 - 1999
This paper demonstrates a methodology to quantify past product development
efforts in an attempt to better utilize past experiences. The methodology is
centered around conducting an observational study, using regression analysis, to
expose relationships between various aspects of past product development
efforts, including cost and time. The applicability of the methodology is
demonstrated by pres...
Optimal maintenance models with minimal repair, periodic overhaul and complete renewal
Tập 30 - Trang 1109-1119 - 1998
This paper investigates the maintenance decision situation in which three
actions, minimal repair, periodic overhaul and complete renewal, may be applied
to the system under consideration. A new mathematical model is proposed to
describe system improvement due to the maintenance action of an overhaul that
differs from the virtual age approach by considering a direct reduction on the
system's failu...
Optimum combined test plans for systems and components
- 1999
Since mathematical models based on component reliabilities are frequently used
for prediction of system reliability, it stands to reason that cost-effective
inferences on the reliability of a system could be made on the basis of tests of
its constituent components. Prior research in the area of system-based component
testing has for the most part addressed the development of plans that test only
t...