| Section |
What this section must establish |
Length discipline |
| Executive summary |
The decision requested, the cost, the benefit, the main risk and the recommendation, readable by someone who reads nothing else |
Half a page, written last |
| Problem and cost of inaction |
That the status quo has a price, quantified, and who is paying it today |
One page; if inaction is genuinely free, the case ends here |
| Options considered |
That at least two real alternatives were examined seriously, including a minimal or phased version of the proposal |
One page; each rejected option gets its actual reason for rejection |
| Recommended option |
What is being bought, built or changed, in operational terms a non-specialist can verify |
One to two pages, no vendor prose |
| Full-life costs |
Every cost to the point of decommissioning: licences, people, backfill, change, integration, exit |
Table plus notes; finance signs the completeness, not just the arithmetic |
| Benefits and their owners |
Each benefit quantified, dated and attached to a named executive whose targets change when it lands |
Table; a benefit without an owner is an aspiration |
| Risks and mitigations |
The three or four risks that could sink the case, with mitigations that cost something |
Half a page; ten trivial risks signal the real ones were not named |
| Sensitivity analysis |
What happens to the case at benefits minus 30%, costs plus 30%, and twelve months of delay |
Three scenarios; if the case only works in the base case, say so |
| Implementation approach |
The first ninety days in concrete steps, and the capacity they consume |
One page; detail beyond ninety days is pretence |
| Decision requested and conditions |
Exactly what approval is sought, in what tranches, and what triggers a return to the approver |
A quarter page, unambiguous |