01
Eight distributions as worksheet functions
Triangular, Beta-PERT, Uniform, Discrete Uniform, Normal, Lognormal, Custom Discrete and Yes-No. Every one is an ordinary formula with in-cell IntelliSense; parameters can themselves be formulas or cell references.
02
Reproducible under a seed
Same model, same seed, same numbers — on any machine. The run record carries the seed, the trial count and the sampling method, so a reviewer can reproduce your run rather than take your word for it.
03
Histogram and View Results
The distribution of each output with its cumulative curve, percentile markers and the contingency above any marker you choose — on a sheet, or in a window that writes nothing to your workbook.
04
Tornado
Which inputs drive each output, ranked by signed rank correlation — and an honest note when an input sits at the ceiling its own shape imposes, so a rare risk is never mistaken for an unimportant one.
05
Impact
How far each input can move each output, measured in the output's own units by swinging it across its range while everything else holds its base value.
06
Tail Drivers
What actually ran atypically in the trials at each end of the range — the inputs that were unusual when the answer was, ranked by standardized shift. The question a tornado cannot answer.
07
Convergence
Was this run long enough? The mean and the percentiles you quote, plotted as the trials accumulate, so you can see them settle — or see that they have not.
08
Correlation
Declare rank correlations between inputs, one-to-one or one-to-many; SimuXL induces them through a copula and reports what was achieved against what was asked.
09
Latin Hypercube sampling
Spread the draws evenly across each distribution for tighter percentiles from fewer trials. The guide says what it buys, what it costs, and why a seed alone no longer identifies a run.
10
Input Summary and Find Inputs
What each input actually drew against what it should have, and a listing of everything SimuXL found in the workbook — including what it could not account for, rather than guessing.
11
HTML and Word reports
The whole run as one shareable file: run record, outputs, convergence, drivers, impact, tail drivers and every input — and a section saying what the report does not cover.
12
Control variables and the Alternative Table
Cells that hold a decision rather than a chance. Type alternatives into a table, run the whole table, and compare the distributions each decision produces.
13
Name, Freeze and Correlate
Name an input in its own formula, hold one at its base value for a run without editing the model, and correlate it with others — the three things you can attach to an Uncertain Input.
14
Export the raw trials
Every trial's draw for every input and output, so you can check any figure in any report with your own arithmetic.
15
Signed, and silent
Every release is code-signed by the publisher. SimuXL needs no internet connection and sends nothing about you, your machine or your workbook anywhere.
16
Rules it enforces, and says so
The things that stop a run are named before the run, with the reason and what to do instead — a cell that draws more than its formula shows, an argument left empty, a call that never fired.
