EXELEUS MERIDIANINDIVIDUAL SERVICE · EASY USER GUIDE
Exeleus Meridian
Easy user guide · Free individual production service · 11 November 2026
1. Your first run
Meridian helps you explore how cyber incidents could affect a network of people, devices and services. You describe the network and its assumptions, then run many simulated scenarios and review their costs.
Start here
Open crq.exeleus.com to create a Free account, or choose Sign In for an existing account. Complete the eligibility, consent and terms screens using your own correct details.
Free personal accounts are for eligible adults; some school-related accounts need a school-managed route. No invitation or payment details are required. Modeling, basic simulations, results and downloads are included, with 25 accepted runs per month.
Follow these six steps
Create a model. Open Model Topology, choose a starter model and click Create model.
Describe your network. Check the assets and connections. Give the model a useful name.
Check the costs. Choose a loss model for each asset. Click Apply, then Save.
Review the assumptions. Click Review assumptions to inspect the whole network's inputs.
Run the model. Check Run settings, then click Run Model.
Read the results. Wait for completed, inspect the costs and download a report.
For your first run, the existing defaults are 100 replications over 30 simulated days. That is one submitted run containing 100 scenarios—not 100 monthly runs.
The guide's screenshots use an illustrative model and demonstration results. Starter values and example numbers are not calibrated estimates for your organization.
EXELEUS MERIDIANINDIVIDUAL SERVICE · EASY USER GUIDE
2. Build and save your network
Model Builder: asset palette on the left, network in the center and action buttons at the top.
Start with a template
In Model Topology, choose a Template, enter a Model name and click Create model. The model opens in the Builder. A template is a starting point: review its assets, connections and values before running it.
Make the network your own
Add an asset. Drag an item from the left palette onto the canvas. On a phone, tap Add agents, then choose an asset.
Edit an asset. Select it to open its properties. Set its name and relevant probabilities, values and costs. Click Apply.
Connect assets. Drag from the blue handle at the bottom of one asset to the green handle at the top of another. Select the connection to check its relationship and transmission probability.
Save. Enter a clear model name and click Save. Saving an opened model updates that model.
Use the CRQ v2 assets for the core workflow: human identity, endpoint, on-prem server, identity provider, SaaS application, cloud data store and integration.
Apply changes the canvas; Save stores the model. Opening a properties panel does not save a change. Run Model also saves the current model before submitting it.
Use a larger screen when possible for detailed network editing. Zoom and pan to move around the canvas.
EXELEUS MERIDIANINDIVIDUAL SERVICE · EASY USER GUIDE
3. Choose costs and review assumptions
Choose how each asset can lose value
Loss option
Use it for
What to enter
Finite asset/data value
A limited data or asset value
Data value and fraction of that value lost per compromised five-minute interval
Recurring operational loss
Ongoing loss while compromised
Operational loss per compromised hour
Finite value + recurring loss
Both limited value and ongoing loss
Both sets of inputs
A finite value is the limit within each simulated scenario; recovery does not refill it. Repair cost is charged at every recovery. Keep the same expense out of multiple categories. Input labels use USD; Meridian does not convert currencies.
Review assumptions separates finite limits, hourly exposure and one repair charge per asset.
Why can the total exceed the asset value?
For one asset, a scenario might include:
USD 1,000 of finite data loss;
USD 100 of operational loss: five compromised hours at USD 20/hour;
USD 150 of repairs: three recoveries at USD 50 each.
The total is USD 1,250. The USD 1,000 limit caps finite data loss—not the other charges. This is an accounting example, not a forecast.
Review the whole model
Click Review assumptions. Search for an asset and use Open asset properties to inspect it. Search does not change the model-wide totals. The amounts shown are input limits and conditional costs, not predicted losses.
Probabilities apply every five minutes. A 2% entry probability per five minutes is much stronger than 2% per day. Use What these probabilities imply in an asset's properties to inspect its isolated reference. Older saved assets may still use repeated-value loss until you explicitly change their loss option, Apply and Save.
Fields marked Budget Screening belong to the separate screening tool; they do not change core Run Model transitions.
EXELEUS MERIDIANINDIVIDUAL SERVICE · EASY USER GUIDE
4. Run a simulation
Run settings: replications, simulated days and optional seed.
Open Run settings in the Builder.
Set Replications: how many simulated scenarios to generate. The default is 100.
Set Simulated days: how long each scenario lasts. The default is 30.
Leave Seed blank for a new recorded random seed. A seed helps repeat a result when the model, inputs and software version also stay the same.
Close Run settings and click Run Model once. The model is saved and the job is submitted.
Go to Results and keep the saved run selected while it finishes.
Stay within the workload limits
You can choose 1–1,000 replications and 1–365 days, provided:
replications × days ≤ 3,000
For example, 100 × 30 is allowed; 100 × 31 is too large. Each accepted submission uses one monthly run allowance.
While you wait
A run may wait in the queue while another job finishes. pending means it is waiting; running means it is executing; completed means a saved result is available.
If the page or request appears to time out, check Results before submitting again. An accepted run may still be working. You can return to its saved result later.
Use Run Model for this workflow. Run Trace is a separate animation for legacy trace assets.
EXELEUS MERIDIANINDIVIDUAL SERVICE · EASY USER GUIDE
5. Understand and download results
Example cost chart: Mean, P50 and P95 summarize the simulated scenarios.
Select your run in Results. Check its model name, status, number of runs and simulated days before interpreting the amounts. Results cover that recorded period; they are not automatically annualized.
Read the summary
Term
Plain meaning
Mean
Average cost across the simulated scenarios
P50
Median: the middle of the modeled outcomes
P95
A higher-cost point, around the 95th percentile—not a worst-case guarantee
Std Dev
How widely the modeled outcomes vary around their mean
Total Modeled Cost
Data loss, recurring operational loss and repair charges combined
The mean and percentiles describe individual scenarios. Do not multiply a mean by 100 simply because you ran 100 replications. Charts show how the scenarios differ; they are not measured incident frequencies for your organization.
Download what you need
Export CSV: open the output in a spreadsheet.
Download report: open a readable HTML report in a browser.
Download run archive: keep the JSON record of submitted inputs and software details with the result.
If a saved result will not load, use Retry loading results when shown. If a download fails, retry the download for that same completed run; a new simulation is not needed.
EXELEUS MERIDIANINDIVIDUAL SERVICE · EASY USER GUIDE
6. Keep your work and recover
Check the model's save status
What the Builder shows
What to do
All model changes saved
The applied model matches the last confirmed save.
Unsaved model changes
Select Save to store the current design.
Property edits not applied
Choose Apply in the asset or relationship panel, then Save.
Saving model…
Wait for confirmation. Edits made during this save still need another save.
The desktop and mobile navigation menus ask before leaving unsaved work. Cancel keeps you in the Builder; OK leaves it. Save before browser Back/Forward or account-menu actions. Refresh/close warnings depend on your browser.
Keep a model backup
Apply property edits, open Model files and select Download model backup.
To reopen a backup, choose its JSON file, review it and select Open as new draft. Confirm replacing the current canvas only when ready.
Select Save to create a new saved model. Existing saved models remain available.
A model backup contains the applied design. Unapplied property edits, results and run settings are separate. Keep the file private if it describes sensitive systems.
After a slow or lost reply
If you edit while Run Model is being submitted, those newer edits stay in the Builder. Use View submitted run to open the original run without submitting again. Save any newer edits before leaving.
If no submission reply arrives, keep the same Builder and settings open and check Results before retrying. Selecting an asset or opening its properties alone does not change that unchanged retry. After refreshing, reopening or changing settings, check existing runs before another submission.
Leaving a page does not cancel work already accepted by the server.
Find an older result
Results search covers the latest 50 runs. Keep Saved link to this run, or use Open a run by reference with the full reference from a saved link or run archive. Searching and reloading read saved results; they do not submit simulations.
EXELEUS MERIDIANINDIVIDUAL SERVICE · EASY USER GUIDE
7. Help and quick reference
If something looks wrong
Situation
What to do
Run Model is disabled
Apply any pending property edits. Use only CRQ v2 assets and check Run settings for an invalid value or a run over the 3,000 replication-day limit.
Run Trace is disabled
It supports legacy trace assets. Use Run Model for a CRQ v2 network.
The run stays pending
It may be queued. Check the saved run in Results; avoid submitting duplicate copies.
Costs look unexpectedly high
Review five-minute probabilities, the loss option, hourly exposure and repeated repair charges. Check the recorded number of days.
A result differs from an earlier run
Check the model inputs, duration, seed and software version. A blank seed selects a new random seed.
The monthly run allowance is used up
Review existing results until the new month's allowance is available. Contact support if the count looks wrong.
You cannot sign in or access a feature
Use your account email, complete the required account screens and contact support if access is still unavailable.
When you return
Open Model Topology → Saved models. Use Find models and the sort/page controls, then select Open model. Search covers your full saved collection; pages show 20 models. Review changes and Save. Completed runs retain their archived inputs. Check Run settings again: reopening restores defaults.
Your account and support
Your Free plan works without an invitation. Separately issued free-access grants are optional; they do not raise normal usage limits.
Use Settings to download your own account records or withdraw eligibility-processing consent. Withdrawal blocks future feature access while your account-record export remains available; it does not itself erase models or results.
For help or a privacy request, email admin@exeleus.com. Include the run reference, approximate time and a short description of the problem. Keep passwords, MFA codes and session tokens private.
A useful habit: review inputs before each run, keep the result's time period in view, and save its report and archive together. Treat the outputs as results of your configured scenario—not a guaranteed future loss.
