A multistage production system consists of a number of
production stages that are interrelated, that is the output
from one stage forms input to the next stage. There are
constraints associated with each stage as well as constraints
imposed by the overall system. Besides, there are multiple
objectives that need...
In February 1994, EPA proposed to "refine" its carbon monoxide (CO) hot spot model,
CAL3QHC, to increase its accuracy and reliability. Currently, this proposal includes
using hourly meteorological data recorded at airports near the modeling sites instead of
the worst case conditions now recommended as a modeling default. The analysis...
The objective of many steady-state simulations is to
study the behavior of a nonterminating system with a peak load
of infinite duration. Due to the complexity of the system, the
initial conditions of the system are often atypical that often
requires the simulators to start the system with the empty...
Public construction projects are frequently presented as
occurring in complex social, political and economic settings
described as being uncertain. In public administration, this
uncertainty is cited as a cause for shifting from the so
called "rational-comprehensive" model of policy and decision
making toward an "incremental" or "mixed-scanning" approach.
None of...
An experimental investigation of factors effecting
scheduling a system of parallel, non-identical processors
using a series of experimental designs was carried out.
System variables included were processor capacities
relationships, sequencing and assignment rules, job size, and
product demand distributions. The effect of the variables was
measured by comparing mean flow...
A decision support system (DSS) for nurse scheduling in
hospitals is developed and implemented on microcomputer. The
system includes algorithms and databases for developing weekly
work and shift patterns and combining these into working
schedules for nurses for a specified time horizon, and
interface modules for the user to interact...
Automated storage and Retrieval (AS/R) systems have had
a significant impact on storage and retrieval of finished
goods, work-in-process, and raw materials and supplies. A
microcomputer-based simulation model was developed to
evaluate different unit load AS/R systems serving multiple
input sources and output destinations. The simulation results
were statistically analyzed...
The focus of this research is to develop a prototype
expert system for softwood lumber grading. The grading
rules used in the knowledge base of the system are based on
Western Lumber Grading Rules 88 published by the Western
Wood Products Association. The system includes 27 grades
in Dimension, Select/Finish,...
Today's manufacturing environment is characterized by competition and
continuous change in product and process requirements. The concept of
"design for manufacturability" integrates product specifications with
manufacturing capabilities by considering the design and manufacturing
phases as an integrated system, evaluating the combined system during
the design phase of a product ,...
One of the commonly used simulation approaches is process orientation. This is based on the use of nodes (or blocks) that perform functions in series. In spite of the compactness and ease of learning that characterize process-based simulation, many languages are somewhat complex, primarily the result of the large number...