Software selection & vendors
How to Build a Software Requirements Catalog That Makes Quotes Comparable
5 min read
A requirements catalog sounds like bureaucracy. In reality it is the most effective instrument for keeping software projects under control.
It serves three purposes: it makes quotes comparable, it becomes part of the contract — and it later defines when the implementation counts as accepted.
Derive from processes, not wish lists
Start with your actual workflows. Walk through every core process and ask: what must the system do at this point? Involve the people who work with it daily — not just the management.
Phrase requirements in business terms: “The system must handle group bookings with allotments and block lists” instead of “The system needs a good group module”.
Prioritize with discipline
Not everything matters equally. Classify every requirement as must, should or nice-to-have. The discipline lies in keeping the must list short: typically 20 to 40 truly business-critical points.
- Must: no go-live without this feature
- Should: important for efficiency, workaround acceptable
- Nice-to-have: future option, not decision-relevant
Prescribe the answer format
Have vendors answer every requirement individually: standard feature, customization, third-party system or not possible — each with a price. Only this produces a comparison matrix that can carry a decision.
The catalog lives on
After selection, the catalog becomes a contract annex and the acceptance baseline. Every must-have requirement the vendor confirmed as standard is part of the deliverable. That is your protection when the project gets difficult.
Bottom line
A good requirements catalog costs a few days of work and saves weeks of dispute later. It is the central document connecting selection, contract and acceptance.
Printable checklist
Defining software requirements
Turn real workflows into testable requirements that support both vendor selection and project acceptance.
A4 · 1 page
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