Zero-Based Budget Planner

When to use

Use whenever spend needs to be justified from a zero base rather than carried forward from last year, or when a budget cut is coming and the instinct is an across-the-board percentage reduction — a method that cuts high-value and low-value spend by the same amount, protecting waste exactly as much as it protects what actually matters.

What it does

Scores every discretionary spend item as a decision package with a cost and a value score, computes value per dollar via a bundled calculator, ranks all packages by that ratio, and shows precisely which packages a stated total budget actually funds versus cuts — separating mandatory spend (compliance, core operations) that gets funded regardless of ranking from discretionary spend that competes on value.

Method

1. Separate mandatory from discretionary spend up front. Mandatory means the business cannot legally or operationally function without it (compliance, core infrastructure, contractual obligations) — these get funded first and are excluded from the ranking competition, since ranking them against a marketing campaign would be a category error.
2. Break discretionary spend into decision packages — a specific initiative or program with a cost and a stated business value, not a department-level lump sum. A department budget line is too coarse to rank; the individual programs inside it are what actually compete for funding.
3. Score each package's value (1-10) based on its actual business impact — revenue contribution, risk reduction, strategic importance — with the reasoning stated, not just a number pulled from department politics.
4. Run the bundled calculator (scripts/zbb_ranker.py) to compute value per dollar for every discretionary package, rank them, and show exactly which packages fall inside the available budget and which get cut.
5. Read the cut list as a set of explicit trade-offs, not a byproduct. If a cut package is politically important despite ranking low on value per dollar, that's now a visible, named decision to override the ranking, rather than an invisible casualty of a blanket percentage cut.
6. Check for packages that are individually low-value but collectively necessary (a set of small tools that together support one critical workflow) — the value score should reflect the package's real function, not just its individual visibility.
7. Publish the ranking, not just the final funded list. Showing why each package was funded or cut is what makes a zero-based budget defensible when someone asks "why did we cut X but keep Y."