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Simulation - Coggle Diagram
Simulation
Areas of Application
Construction Engineering
Construction of a dam embankment
Overview of completed urban infrastructure
Structural erection processes
Human Systems
Modeling human performance
Complex systems
Semiconductor Manufacturing
Comparison of dispatching rules using large-facility models
Comparison of Photolithography process
Assessment of potential gains in productivity
Business Process Simulation
Impact of connection bank redesign on airport gate assignment
Process of product development
Remodeling of existing business and systems
Manufacturing Application
Analysis of Electronics assembly operations
Existing day to day operations
Optimization of existing cycle time needed for manufacturing
Logistics, Transportation and Distribution Application
Evaluating the potential benefits of a rail-traffic planning algorithm
Distribution of product
Strategies of potential solution
Military Application
Type of leadership effects and recruit type in an Army recruiting station
War scenario operations
Testing of military prototype
When is it Appropriate or Inappropriate?
Appropriate for/when
using as a pedagogical device to
reinforce analytic solution methodologies
changing inputs and observing outputs provide insights
how variables interact
which variables are important
experimentation before implementation, to prepare for what can happen
new designs
policies
Knowledge gained from designing simulation brings great value towards suggesting improvements
verify analytic solutions
determining requirements via
simulation of different capabilities
Simulating and observing effects of changes on the model's behaviour
Informational changes
Organizational changes
Environmental Changes
enable training and learning without
cost of on-job training
disruption caused by on-job training
studying and experimentating with
Internal interactions of a complex system
Subsystem within a complex system
visualising the plan via animating the operations
modern system is too complex, hence system interactions can only be treated by simulation
Inappropriate
When the problem can be solved
Common Sense
Analytically
Mathematically
In situations
where it is easier to perform direct experiments
no personnel are available
when costs exceeds savings
unavailable information or no access to
time
manpower
estimation
input data
resources
when system behaviour is
too complex
unknown
undefined
Advantages and Disadvantages of Simulation
Advantages
Interaction of variables can be obtained
Importance of the variables to the performance of the system can be obtained
Time is flexible when phenomena is under investigation
Bottleneck analysis can be performed when there are delays in several aspects of the system information, materials etc.
Hypotheses can be tested for feasibility
Helps to understand how a system operates instead of how individuals think the system operates
Resources can be tested without acquisition
"What-if" questions can be answered
Ongoing operations of the system are not disrupted
Disadvantages
Simulation results are difficult to interpret
Requires special training and experience
How can these disadvantages be offset?
Simulation software are easier to use which contain "simulators" or "templates. Only data input is required
Closed-form models are not able to analyze most complex systems encountered in practice
Simulation software vendors have developed output analysis capabilities
Advances in hardware have allowed faster simulators
Analytical solution might be preferable over simulation, where closed-form model queueing models are available
Time consuming and expensive