Why Projects Go Over Budget
Before we talk about better scoping, let's understand why projects typically exceed their budgets:
- Optimism bias: We naturally underestimate complexity
- Missing requirements: What seems simple often has hidden depth
- Scope changes: Projects evolve, but budgets don't
- Unknown unknowns: Some challenges only emerge during execution
The Foundation: Better Discovery
Good scoping starts with thorough discovery. Uncover the real problem—clients often come with solutions in mind. Your job is to understand the underlying problem.
Estimation Techniques That Work
Three-Point Estimation
For each task, estimate Optimistic, Pessimistic, and Most Likely scenarios. Use the weighted average: (Optimistic + 4×Most Likely + Pessimistic) / 6
Reference Class Forecasting
Instead of estimating from scratch, compare to similar past projects. Your time tracking data becomes invaluable here.
Building in Buffers
No estimate is perfect. Build in 10-20% general contingency for unknown unknowns.
