Relative sizing (e.g., Fibonacci) based on complexity rather than hours. Active Agile Teams

Invest 5–10% of the total project budget in a 2–4 week discovery period to remove the single largest source of cost overruns.

Using statistical relationships (e.g., COCOMO II ) based on lines of code or function points. Enterprise/Repeat Work

Tools in 2026 are prioritized by their ability to integrate planning with live delivery data.

Using LLMs to generate a first-pass Work Breakdown Structure (WBS) for human review. Initial Scoping 2. Best Practices for 2026

Modern teams use a "layered" approach, applying different techniques as project clarity increases along the . Description Best Stage Analogy-Based Comparing the new project to a similar completed one. Early/Concept Three-Point (PERT)

Captures Optimistic, Most Likely, and Pessimistic estimates to find a weighted average: Planning/Risk Assessment

Decomposing a system into granular tasks and summing individual estimates. Detailed Design