Gacha System Impact Evaluator
MATH.JS ENHANCED
-- Preset Scenarios --
Rate Cut & Pool Dilution (0.8% -> 0.5%)
Pity Extension (180 -> 200 Hard Pity)
Soft Pity Delay (74 -> 80 Soft Start)
Run Monte Carlo (10,000 Iter)
Export CSV
Reset
Mechanic Parameters
Baseline
Revised
Target Copies (Dupes)
1
Cost per Pull (JPY)
300 JPY
Base SSR Rate (%)
1.0%
Rate-up Featured Share (%)
80%
Soft Pity Start Pull
74
Soft Pity Linear Increment / Pull
+6.0%
Hard Pity Ceiling
180
Baseline Expected Pulls
93.4
28,020 JPY
Revised Expected Pulls
138.2
41,460 JPY
Expected Cost Impact
+47.9%
+13,440 JPY shift
90th Percentile Tail Risk (Revised)
60,000 JPY
200 pulls guarantee
Cumulative Distribution Function (CDF Probability)
Analytical Math.js Exact Mode
Percentile Cost & Budget Thresholds
Percentile Target
Baseline Pulls
Baseline JPY
Revised Pulls
Revised JPY
Delta Cost (JPY)
Monte Carlo Empirical Verification
Compare exact mathematical expectations against 10,000 empirical simulated player acquisition runs.
Run Empirical Simulation
Status: Ready for empirical validation run.
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