Crate distimate

Distimate: Estimation Distributions for Project Planning and Risk Analysis

distimate is a Rust crate that provides a set of probability distributions commonly used in estimation, along with a trait for working with these distributions in an estimation context. It’s designed to assist in project planning, risk analysis, and decision-making under uncertainty.

Features

• A variety of estimation-focused probability distributions
• A unified EstimationDistribution trait for working with these distributions
• Tools for calculating confidence intervals, risk assessments, and fit quality
• Easy-to-use prelude module for convenient imports

Quick Start

To get started with distimate, add it to your Cargo.toml:

[dependencies]
distimate = "0.1.0"  # replace with the current version

Then, in your Rust file:

use distimate::prelude::*;
use distimate::Pert;

fn main() -> Result<()> {
    let pert = Pert::new(1.0, 2.0, 3.0)?;
    println!("Expected value: {}", pert.expected_value());
    println!("95% confidence interval: {:?}", pert.confidence_interval(0.95));
    Ok(())
}

Available Distributions

• PERT (Program Evaluation and Review Technique)
• Triangular
• Normal

The EstimationDistribution Trait

The EstimationDistribution trait provides a unified interface for working with probability distributions in an estimation context. It includes methods for calculating percentiles, confidence intervals, and assessing risk.

Error Handling

This crate uses a custom Error type and Result alias for error handling. Most methods that can fail will return a Result<T, Error>.

Prelude

For convenience, commonly used items are re-exported in the prelude module. You can import all of these at once with use distimate::prelude::*;.

Modules

prelude

Structs

EstimationFitQuality

Represents the quality of fit for an estimation distribution.

Normal

Represents a modified Normal distribution for estimation purposes.

Pert

Represents a PERT (Program Evaluation and Review Technique) distribution.

Triangular

Represents a Triangular distribution.

Enums

Error

Traits

EstimationDistribution

A trait for probability distributions used in estimation scenarios.

Type Aliases

Result