代写MGMT 271、代做Java程序、c/c++，Python语言电信、Business留学生代做

日期：2019-08-11 11:24

MGMT 271 2019

Simulation Assignment (Worth 15%)

Due in by 4pm, 19 August.

Work in pairs (find your own partner). If you really can’t find someone to work with single

assignments are OK but I find working in pairs reduces disasters! No more than 2 people in a group.

Please attach a completed copy of the coversheet to your (paper) report.

as it has the marks scheme on the back.) Please also submit a paper copy of the report for me to mark. Don’t bind

it. Just staple it at the top left-hand corner. Put your report in the assignment box on Level 2,

Meremere (Business and Law). Sending it in by email makes it a lot easier for me to run your Simul8

model

Individual team members can get different marks depending on their contributions.

The Assignment

Select a production, operations or service situation which you believe can be modelled by simulation and

build a Simul8 model of it. It need not be too complicated, and it does not need to incorporate every last

detail. You should acknowledge any sources on which you base your model. You can use the Simul8

Examples as a basis of your model but not the Templates.

1. Simul8 can model a number of features that are applicable to particular situations- e.g. it can do:

shelf life, FMCG, shift work, time dependent distributions, machine failures and repair times,

resources, priorities, batching, splitting, different queue disciplines, buffer overflows, etc.. Make

sure your model includes at least two (and preferably more) features/extensions that are appropriate

for your situation. Explain how you implemented them.

2. Think of a suitable system change (or changes) you could make to your model (e.g more

machines/workers/buffer space, different layout) Run the changed simulation model to estimate the

effects of the change.

3. There are some marks for appropriate graphical presentation of your model (e.g. some titles,

meaningful icons) – your client needs to recognise their system.

4. Each run of a simulation model is a statistical experiment, with the answers depending on the values

of the random variates that it uses. To get a reliable answer you should run a number of replications

of the model (using Trials in Simul8) and get some confidence intervals for the means of your

numerical answers. I’d start with 100 runs and keep increasing until the confidence intervals are

small enough. (Half-width of confidence interval < 5% of mean value is one criterion)

5. Write a report on what you did. This should include a description of the situation you are modelling;

pictures of your Simul8 models; descriptions of how you implemented the features; the system

change(s) you implemented; and results of suitable KPI’s (with confidence intervals) showing the

effects of the changes. There is no page-length limit, but about 5 pages is often enough.

Some Suggestions

Sketch your model on paper and work out how you are going to make it model the situation before you start

putting it into Simul8. Now think of the Simul8 features, and the system change(s) you are going to do before

you invest too much time building your initial model.

Simul8 can lock up if you make too many changes, especially if the model is full of Work Items. Go back to

Start (i.e. empty them out) before you save your model.

Things to watch

Make sure you change the results collection period to match how your system runs- i.e. usually your “day”.

No “weeks” or 40-hour days! The probability distributions you use don’t matter too much as long as they are

sensible. So no Poisson or Binomial distributions - they count numbers of events! Turn the automatic travel

times off!