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BRUNEL UNIVERSITY
SCHOOL OF ENGINEERING AND DESIGN
SYSTEMS MODELLING & SIMULATION
Dr A. MOUSAVI
GUIDELINES FOR THE ARENA ASSIGNMENT AND PROJECT
For details on submission date refer to lecture notes No. 1 on:
http://people.brunel.ac.uk/~emstaam/ or the Course Officer at TPO
Individual Assignments (for All Students)
Reports for the assignment and project comprise the following three elements:
1. Main body of assignment
The key issues to be addressed in the main body of the assignment are in brief the
following:
Flowchart Description: A clear explanation of how the model was built should be
provided. This should mainly refer to the modules that were used and their exact
place in the flowchart. This part should also provide an indication of how the major
parameters of these modules have been set. One good way to achieve this is by
using screenshots of the windows/dialog boxes presenting the modules parameters.
Note: You are not expected to describe how you literally built the model using
Arena. Descriptions of how the modules were selected from the project bar and then
placed on the model window or of how the of each module
were accessed so as to enter data are considered to be obvious and therefore
should be omitted.
Run Setup Parameters: Based on the requirements of each specific
problem/exercise, you are expected to make decisions on how the simulation run
setup parameters should be determined. The simulation run setup refers mainly to
the number of replications, replication length, time units and in general all the
parameters included in the Replication Parameters tag appearing in the Setup option
of the Run menu. The determination of setup parameters that conform to the
requirements of the assignments is a key point. Incorrect selection of the run setup
parameters will result in findings different from those expected (regardless of the fact
that the model can be absolutely correct).
Answers to the exercises questions: Following the presentation of the model, the
main part of the assignment should serve the purpose of identifying the questions
that need to be answered for each problem/exercise. Furthermore, it is expected that
a complete and clearly stated answer should be provided for each of these
questions. Whenever the problems questions are related to one or more of the
collected statistics, the answers presented should be in accordance with those
appearing in the statistics reports (see section below for the appendix).
In some cases the problems/exercises require, in addition to a number of statistics,
information on e.g. the system performance under a number of alternative scenarios
or a number of plots, animations etc. It is important to note that you will be assessed
against all the required information.
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2. Report Appendix
In the appendix you are expected to provide the Statistics Reports. You are advised
to prefer the Summary Statistics Reports, which are considerably shorter than those
appearing in the Reports Panel (in the Project Bar) of the Arena interface. The
Summary Statistics Reports are generated automatically by Arena after each
simulation run and are saved in the form of a text file (*.out) in exactly the same
folder where you saved the model. In order to be able to get such (*.out) files you
may need to make appropriate changes in the fields Default Report and Display
SIMAN summary report (*.out file) in the Reports tag appearing under Tools
>Options.
There are a number of issues that will be checked during the marking. Apart from the
correctness of the collected statistics attention will also be paid to the:
Run set up parameters that should be consistent with those presented in the
main body of the assignment,
Analysts name that in turn should point to the student submitting the
assignment.
3. Submission of models on CD
Along with the assignment you are also expected to submit a CD where you should
have saved the *.doe file/s containing your model/s.
More specifically, the CD should:
be accessible,
include only the final version of the file/s that correspond to the required
model/s,
contain files that the Arena software can run and can thus generate results
(bear in mind that even using unacceptable filenames can result in Arena
being unable to run the model in spite of the fact that the latter can be
absolutely correct. In such cases it is also impossible to collect any statistics
reports). Failed runs during assessment will result into F.
Contain files which correspond to the models that have been presented in the
assignment (both main body and appendix). In other words, it is unacceptable
to discover that running the model contained in the CD generates different
results from those presented in the assignment report.
Contain the students (submitting the assignment) name as well as the
reference number of the assignment on the label of the CD.
Be attached to the assignment so that it should not get lost or examined
separately from the assignment.
Students are also requested to provide their email so that they will be contacted in
case there are problems with accessing their CDs.
Assignments Submission Deadlines
The submission of the assignments should not under any circumstances exceed the
relevant submission deadlines (For the dates please refer to Lecture Notes No. 1 on
http://people.brunel.ac.uk/~emstaam/ and following the links to the module
webpage). However, when special cases apply (e.g. whether there are mitigating
circumstances) , assignments will be accepted and marked
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beyond the submission deadline only when they are accompanied by the late
submission cover sheet bearing the Module Coordinators signature.
Marking scheme
INDIVIDUAL ASSIGNMENT SYSTEMS MODELLING AND SIMULATION
MARKING SCHEME1
Section Description Total
Mark
A
Overall
Modelling
Approach
1. Model organisation
10 2. Data accuracy
3. Run Setup
4. Bonus2
B
Entity
Modelling and
Routing
1. Accurate generation entities and assignment of attributes
10
2. Accurate assignment of variables and changes required
during simulation run
3. Accurate process planning and sequencing
4. Accurately routes different types of components
according to given plan
5. Bonus2
C
Resources and
Stations
1. Used stations and routes well
10
2. Used schedules well
3. well
4. Used sets
5. Use of expressions and variables
6. Queue priorities
D Animation
1. Has animation
10 2. Displays statistics
3. Animation works well
4. Bonus2
E
Results and
Analysis
1. Achieving expected results (output)
20
2. Interpretation of results
3. Identification of problems (e.g. bottlenecks, congestions,
imbalanced lines, layout, etc.)
4. demonstrate full understanding of the simulation results
of current system
G
Improvements
&
Analysis
1. Providing proposal for improvements and change (what
if scenarios)
30 2. Modelling and Simulation of proposals
3. Providing reasonable arguments for proposed system in
the form of comparisons between original and new models
4. Arguments related to specified performance measures
I
Conclusions 1. Detailed conclusion closing argument, reflection on the
approach and what could have been done better 10
1 Note that this scheme is adjusted every year based on the type of the assignment. But the essence of
assessment scheme remains universal. This is just a sample guide.
2 Bonus marks (normally between 1-3% in the corresponding section) is for relevant initiative and
innovative approaches)
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Group Project (For Full Time Students Only)
All the rules of report writing and submission described in the previous sections (the
assignment submission) apply to the project submission.
In addition for the group project, all members of each group MUST make equal
contributions to the development of the models, simulation project, project
management and group analysis).
All group reports must include a page label Group member assignment which
clearly shows the name of each group member and which part of the project he/she
contributed to, each member would be responsible for writing and compiling that part
of the project. This must also be indicated in the body of the report.
The introduction and conclusions where improved models are discussed should have
equal contribution by each member.
Remember that the group performance can affect individual performance.
The group project consists of:
Finding a suitable subject and negotiating with the business/company/centre
owner. For example a factory operations, banking, healthcare, service,
restaurant, or purchasing an artefact (by group members) not exceeding
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