XP Builder

XP Builder provides a structured framework for planning UX experiments with repeatable templates. It supports A/B, multivariate, and sequential tests, capturing objective, baseline, uplift expectations, duration, and traffic allocation. The tool calculates statistical requirements and delivers a clear plan for teams to execute experiments with rigor. By modeling multiple variants and segments, it helps identify robust improvements while guarding against spurious subgroup results. The analysis outputs include estimated lift, required sample size, power, and confidence intervals, complemented by actionable recommendations. The system maintains an audit trail of assumptions and decisions to support governance and reproducibility. Users can export plans to JSON or CSV for integration with analytics pipelines or instrumentation. The ripple effect of XP Builder lies in standardizing experimental thinking across teams and enabling faster, more reliable decision making about UX changes.