Field Library

All Articles

Evidence, methods, and operating insight for decisions that must work in the field.

23Published articles

Business Decision Science

When Sales Data Tunes the Bayesian Engine

The EXA Bayesian Engine calculated win probabilities, but its precision depended on manually configured initial parameters. When 100 historical deals accumulated, the engine was ready to evolve on its own. Grid Search, MCMC Ensemble Sampling, and Cross-Validation — three mathematical pillars working in concert to find optimal parameters. Told as a story.

February 26, 202613 min read

Bayesian
Auto-Tuner
Grid Search

Bayesian

Testing Parameter Consensus with MCMC and Cross-Validation

If Grid Search found the 'tallest hill,' the MCMC Ensemble Sampler is the process by which 256 explorers reach consensus that 'the height is correct.' The mathematical principles behind Emcee's affine-invariant walkers, R̂ convergence diagnostics, HDI 95% credible intervals, 5-Fold cross-validation, and Signal Lift analysis — explained with business context.

February 26, 202615 min read

Bayesian
Auto-Tuner
MCMC

All Articles

2 articles tagged “Cross-Validation”

When Sales Data Tunes the Bayesian Engine

Testing Parameter Consensus with MCMC and Cross-Validation

All Articles

2 articles tagged “Cross-Validation”

When Sales Data Tunes the Bayesian Engine

Testing Parameter Consensus with MCMC and Cross-Validation