The model file, the assignment brief, any error messages and one line on what you have already tried. That way the hour goes on the problem rather than on setup.
Open your model, share your screen and work through it with someone who has built these before. From placing your first machines to working out why throughput drops after hour six, every session starts with your file and your deadline. Live WITNESS tutoring for process modelling, experimentation and coursework analysis.
No fixed syllabus and no recorded lectures. You bring the element that will not behave, the result you cannot explain or the report due Friday, and the session is built around it. Live, one to one, at the pace you need.
Tutors Who Have Built These Models
Our witness tutors come from simulation and operations backgrounds. They have hit the same problems you are hitting and can tell you why the model is doing it.
Screen Share, Not Slideshows
You open WITNESS, we watch it run together, and we fix it live. Support that follows your actual file instead of a generic worked example.
Built Around What You Are Marked On
Sharpen the modelling, the statistics and the written analysis your assessment actually rewards, always within academic integrity rules.
Pick the part you are wrestling with. Everything below is something students bring to a session, from an empty layout to a model that runs fine but gives numbers you cannot explain.
Turn a written process description into the right set of elements before you start dragging things onto the screen.
Part · Machine · BufferWork out when you need a batch, assembly, production or multi-cycle machine rather than a single one.
Single · Batch · AssemblySet buffer sizes and queue discipline so the model reflects real storage limits instead of infinite space.
FIFO · LIFOModel transport time properly with conveyors, tracks and vehicles when distance actually affects your results.
Conveyor · Track · VehicleAdd operators, set shift patterns and breaks, and see what happens when staff become the constraint.
Labor · ShiftsTag parts with their own data and track custom counters so you can measure what your brief asks for.
Attribute · VariableGet parts pulling from and pushing to the right places, which is where most routing problems actually start.
PULL · PUSH · WAITSend a share of parts down one route and the rest down another, or pick the shortest queue automatically.
PERCENT · SEQUENCE · MOSTRoute parts based on their own attributes so different product types follow different paths through the line.
IF · ELSEUse initialize, start and finish actions to set values, count events and control behaviour at the right moment.
Initialize · Start · FinishSet availability, time between failures and repair time so downtime behaves the way your data says it should.
MTBF · MTTRModel the time lost when a machine switches between product types, which often explains a bottleneck.
SetupThe model runs, the clock moves, but nothing enters. We trace it back to the part arrival settings and first rule.
One buffer fills and everything upstream stops. Find whether it is a rate mismatch, a rule or a capacity limit.
A machine sits unused while work waits nearby. Usually a rule pointing at the wrong element or a missing operator.
Tell the two apart in the statistics, because they point to opposite fixes at opposite ends of the line.
Use utilisation and queue data to prove where the constraint is rather than guessing from the animation.
Slow the run down and watch event by event, which is the fastest way to see what the model is really doing.
Pick arrival and cycle time distributions that match your data, and be able to justify the choice in your report.
NEGEXP · NORMAL · TRIANGLEWork out how long the model needs to settle, then exclude that period so startup does not distort your averages.
Run the model enough times with different seeds to report a confidence interval instead of one lucky result.
Random seedSet up what-if runs, add a machine or change a shift, and show clearly what each change did to throughput.
ExperimenterInterpret busy, idle, blocked and broken percentages and say what they mean for the process, not just the model.
UtilisationShow the model does what you intended and that it reflects the real system, which markers look for specifically.
Not sure which one your problem falls under? Send us the model file and the assignment brief, and we will tell you before you book.
Your session can focus on one urgent question or form part of a longer learning plan. Common areas of support include:
Create an account on our platform powered by Teachworks LMS by sharing your academic needs, availability, and learning preferences.
Receive your secure login credentials and access your personalized student portal to manage your sessions, tutors, and learning progress.
Book your session, complete your secure payment via Stripe, and join your live, interactive lesson to begin your learning journey.
Leave with clearer priorities, suggested practice and the option to book further sessions.
Ideal for students needing help with basic or entry-level college material.
Tailored support for core and elective undergraduate courses.
Designed for master's level coursework and capstone projects.
Elite academic coaching for doctoral-level work and publications.
Tell us what you are building, what has gone wrong and when you are free. Attach the model file and the brief if you have them. We will read it before we reply and match you with a WITNESS tutor who fits.
No guaranteed grades. No completed assignments. Educational tutoring only.
What Our Students Say
Feedback from University of Liverpool students we have supported with WITNESS simulation modelling and coursework.
Simulation rarely sits on its own. If your module pulls in operations theory, statistics or a research write-up, we cover those too.
1:1 Vensim tutoring for building and analysing system dynamics models, and interpreting simulation results for operations, business and process scenarios.
Support with descriptive statistics, regression, ANOVA, reliability testing and reading SPSS output correctly for your write-up.
Guidance on data management, do-file scripting, regression modelling and panel data analysis for quantitative research projects.
It is live academic support for students working in WITNESS Horizon. A tutor explains the simulation concepts, walks you through the software, helps you read your results and preps you for assessment. It is teaching, not a modelling service, and it does not replace doing your own coursework.
WITNESS Horizon, including the student and academic editions universities hand out. Mention your version and licence when you book. Some features such as the Experimenter and Optimizer are limited or missing in student editions, and that changes what a task can involve.
That is one of the most common reasons students come to us. Parts stacking up in a buffer, machines idle when they should be busy, routing quietly sending work the wrong way. Send the file and we will trace it with you, so you can spot it yourself next time.
No. A tutor explains ideas, reviews your approach, discusses method and helps you understand your own output. They will not build the model or write the submission. The work stays yours.
Not at all. Plenty of first sessions start from an empty screen. Say where you are when you book and the tutor will pitch it there.
We read your module, level, WITNESS version and the task you sent, then match you with someone whose background lines up. You are not handed to whoever happens to be free.
Your trusted partner for plagiarism detection, AI writing evaluation, tutoring, and academic feedback.
Copyright © 2026 – Skyline | Powered by Skyline