Start with an activity whose scale can change
A discretionary budget review should answer what the company will receive at each spending level. Last year's cost plus a percentage does not show that. Select an activity where management can change the service, delivery method or volume, and describe the outcome it is meant to produce. Keep unavoidable commitments visible before debating optional additions.
ACCA describes decision packages within zero-based budgeting: an activity's purpose, cost, alternatives, performance measures and consequences at different service levels. The practical approach below applies that idea to a selected spending area. It does not require rebuilding every department's budget from zero at the same time.
References: ACCA: Comparing budgeting techniques
Separate the base service from increments
Ask the activity owner to define the minimum viable provision and the additional benefit from each expansion. Explain what stops, slows or moves elsewhere at the minimum level. A proposal that labels every current activity essential has not yet exposed a useful choice. A proposal that ignores binding commitments understates the available choices in a different way.
For a hypothetical internal training program, the base package costs $12,000. Adding practical workshops costs another $8,000, and adding individual coaching costs a further $15,000. The three service levels cost $12,000, $20,000 and $35,000 in total. Adding all three totals would incorrectly request $67,000 because the higher levels already include the lower ones.
| Illustrative level | Total annual cost | Decision to explain |
|---|---|---|
| Base instruction | $12,000 | Which skills and participants it covers |
| Base plus workshops | $20,000 | What the additional $8,000 changes |
| Workshops plus coaching | $35,000 | What the further $15,000 achieves |
Compare alternatives on the same service promise
An internal program and an external course may use different mixes of cash and employee time. Include preparation, attendance, supervision and implementation effort that changes between the options. Show whether those hours displace other work or require additional payments. An invoice-only comparison can overlook the scarce resource that actually limits delivery.
Define outcomes that can be observed without inventing a financial return. A training package might require completion of a specified task to an agreed quality standard. If management cannot support a monetary benefit, present the operational rationale and cost openly. A fabricated revenue attribution makes unlike packages look comparable without improving the decision.
Rank increments and dependencies together
Compare the incremental packages across the selected spending areas. Identify additions that depend on an approved base, and alternatives that cannot be purchased together. A high-priority workshop increment is not a complete program if its base instruction has been rejected. Preserve those dependencies when management combines requests under the available budget.
Include the effect on other teams. Cutting support in one department can transfer work into a more expensive or constrained team. Ask the receiving manager to confirm that consequence. Record qualitative considerations alongside the financial comparison so the approval reflects the actual service choice, rather than whichever request has the most persuasive spreadsheet.
Approve an operating choice with a review point
The approval should identify the selected package, responsible owner, spending limit and service expectation. If the activity is staged, state what evidence is required before releasing the next increment. A reduced budget without a reduced scope leaves the manager accountable for an impossible combination.
At the review date, compare delivered activity and observed outcomes with the approved package. Investigate whether the original cost estimate omitted essential work or whether demand changed. Use that evidence for the next allocation. The purpose of the exercise is a defensible service decision, not an annual ritual in which every manager rewrites the same justification.
Sources
Requirements and product details can change. Check the linked guidance for the facts that apply to your situation.
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